TY  - JOUR
AU  - Petković, Dušan
AU  - Brajović, Ljiljana
AU  - Vasilić, Violeta
AU  - Босиочић, Станислава
PY  - 2023
UR  - https://www.sits.org.rs/textview.php?file=917.html
UR  - https://scindeks.ceon.rs/Article.aspx?artid=0040-21762301021P
UR  - https://grafar.grf.bg.ac.rs/handle/123456789/3043
AB  - Višefrekvencijski GNSS satelitski signali i njihova dostupnost omogućavaju istraživanja u nediferenciranom i nekombinovanom modelu u kome je pojedinačni signal na svakoj frekvenciji odgovarajuće nezavisno opažanje. Ovakve mogućnosti izazivaju veliko interesovanje ne samo u geodetskim istraživanjima već i u mnogim oblastima primene GNSS opažanja. Na geometrijskoj putanji signala između satelita i prijemnika, značajni izvor grešaka GNSS merenja dolazi zbog sredine prostiranja elektromagnetskih talasa. Greške koje se pripisuju prostiranju signala su jonosferski i troposferski uticaji. Navedeni izvori grešaka značajno utiču na kvalitet određenih pseudodužina, pa samim time i na kvalitet određenog položaja prijemnika u vidu trodimenzionalnih koordinata. U radu je prikazana analiza i određivanje jonosferskog kašnjenja GNSS satelitskih signala na osnovu određivanja Total Electron Content – TEC na pet stanica (Beograd, Leskovac, Sombor, Zaječar i Kraljevo) na prostoru Republike Srbije. U cilju određivanja vrednosti TEC-a, korišćen je softver pod nazivom „GPS-TEC analysis“ razvijen  u okviru Institute for Scientific Research, Boston College, USA, koji omogućava određivanje TEC vrednosti na  putanji između satelita i prijemnika. Prikupljanje podataka izvršeno je u okviru 2022. godine tako da merne sesije obuhvate karakteristične datume u okviru godine kada se očekuju najveća kolebanja u kontekstu sezonskih varijacija.
AB  - Multi-frequency GNSS satellite signals and their availability enable research in undifferentiated and uncombined models in which a single signal at each frequency is a corresponding independent observation. Such possibilities are reflected by the significant interest in geodetic research as well as in many areas of application of GNSS observation. On the geometric path of the signal between the satellite and the receiver, a significant source of GNSS measurement errors comes from the medium of propagation of electromagnetic waves. Errors attributed to signal propagation are ionospheric and tropospheric signal delay. The mentioned error sources significantly affect the quality of certain pseudorange and, thus, the quality of the receiver's position in the form of three-dimensional coordinates. This paper presents the analysis and determination of the ionospheric delay of GNSS satellite signals based on the determination of Total Electron Content - TEC at five stations (Beograd, Leskovac, Sombor, Zaječar, and Kraljevo) in the territory of the Republic of Serbia. In order to determine TEC values, the software called "GPS-TEC analysis" developed within the Institute for Scientific Research, Boston College, USA was used, which enables the determination of the TEC value on the path between the satellite and the receiver. The data collection was carried out within the year 2022 so that the measurement sessions include characteristic dates when the most significant fluctuations are expected in the context of seasonal variations.
PB  - Savez inženjera i tehničara Srbije, Beograd
T2  - Tehnika
T1  - Doprinos određivanju jonosferskog kašnjenja GNSS satelitskih signala na teritoriji Republike Srbije
EP  - 28
IS  - 1
SP  - 21
VL  - 78
DO  - 10.5937/tehnika2301021P
ER  - 

@article{
author = "Petković, Dušan and Brajović, Ljiljana and Vasilić, Violeta and Босиочић, Станислава",
year = "2023",
abstract = "Višefrekvencijski GNSS satelitski signali i njihova dostupnost omogućavaju istraživanja u nediferenciranom i nekombinovanom modelu u kome je pojedinačni signal na svakoj frekvenciji odgovarajuće nezavisno opažanje. Ovakve mogućnosti izazivaju veliko interesovanje ne samo u geodetskim istraživanjima već i u mnogim oblastima primene GNSS opažanja. Na geometrijskoj putanji signala između satelita i prijemnika, značajni izvor grešaka GNSS merenja dolazi zbog sredine prostiranja elektromagnetskih talasa. Greške koje se pripisuju prostiranju signala su jonosferski i troposferski uticaji. Navedeni izvori grešaka značajno utiču na kvalitet određenih pseudodužina, pa samim time i na kvalitet određenog položaja prijemnika u vidu trodimenzionalnih koordinata. U radu je prikazana analiza i određivanje jonosferskog kašnjenja GNSS satelitskih signala na osnovu određivanja Total Electron Content – TEC na pet stanica (Beograd, Leskovac, Sombor, Zaječar i Kraljevo) na prostoru Republike Srbije. U cilju određivanja vrednosti TEC-a, korišćen je softver pod nazivom „GPS-TEC analysis“ razvijen  u okviru Institute for Scientific Research, Boston College, USA, koji omogućava određivanje TEC vrednosti na  putanji između satelita i prijemnika. Prikupljanje podataka izvršeno je u okviru 2022. godine tako da merne sesije obuhvate karakteristične datume u okviru godine kada se očekuju najveća kolebanja u kontekstu sezonskih varijacija., Multi-frequency GNSS satellite signals and their availability enable research in undifferentiated and uncombined models in which a single signal at each frequency is a corresponding independent observation. Such possibilities are reflected by the significant interest in geodetic research as well as in many areas of application of GNSS observation. On the geometric path of the signal between the satellite and the receiver, a significant source of GNSS measurement errors comes from the medium of propagation of electromagnetic waves. Errors attributed to signal propagation are ionospheric and tropospheric signal delay. The mentioned error sources significantly affect the quality of certain pseudorange and, thus, the quality of the receiver's position in the form of three-dimensional coordinates. This paper presents the analysis and determination of the ionospheric delay of GNSS satellite signals based on the determination of Total Electron Content - TEC at five stations (Beograd, Leskovac, Sombor, Zaječar, and Kraljevo) in the territory of the Republic of Serbia. In order to determine TEC values, the software called "GPS-TEC analysis" developed within the Institute for Scientific Research, Boston College, USA was used, which enables the determination of the TEC value on the path between the satellite and the receiver. The data collection was carried out within the year 2022 so that the measurement sessions include characteristic dates when the most significant fluctuations are expected in the context of seasonal variations.",
publisher = "Savez inženjera i tehničara Srbije, Beograd",
journal = "Tehnika",
title = "Doprinos određivanju jonosferskog kašnjenja GNSS satelitskih signala na teritoriji Republike Srbije",
pages = "28-21",
number = "1",
volume = "78",
doi = "10.5937/tehnika2301021P"
}

Petković, D., Brajović, L., Vasilić, V.,& Босиочић, С.. (2023). Doprinos određivanju jonosferskog kašnjenja GNSS satelitskih signala na teritoriji Republike Srbije. in Tehnika
Savez inženjera i tehničara Srbije, Beograd., 78(1), 21-28.
https://doi.org/10.5937/tehnika2301021P

Petković D, Brajović L, Vasilić V, Босиочић С. Doprinos određivanju jonosferskog kašnjenja GNSS satelitskih signala na teritoriji Republike Srbije. in Tehnika. 2023;78(1):21-28.
doi:10.5937/tehnika2301021P .

Petković, Dušan, Brajović, Ljiljana, Vasilić, Violeta, Босиочић, Станислава, "Doprinos određivanju jonosferskog kašnjenja GNSS satelitskih signala na teritoriji Republike Srbije" in Tehnika, 78, no. 1 (2023):21-28,
https://doi.org/10.5937/tehnika2301021P . .

TY  - CONF
AU  - Vasilić, Violeta
AU  - Brajović, Ljiljana
AU  - Petković, Dušan
AU  - Blagojević, Dragan
PY  - 2023
UR  - https://grafar.grf.bg.ac.rs/handle/123456789/3229
AB  - The propagation of the Global Navigation Satellite System (GNSS) signals through the atmosphere is affected by the electron content in the ionosphere and the air density in the electrically neutral troposphere, thus causing a signal delay and leading to errors in the GNSS observations and the estimated positions. 	Our research has been conducted related to the influence of the tropospheric layer of the Earth's atmosphere on signals at geodetic observation stations in the zenith direction. Since tropospheric refraction cannot be directly estimated, the signal delay has been quantified by applying several developed models. As the lowest layer of the atmosphere, the average height of the troposphere is approximately ten kilometers, and it is variable concerning the latitude of the measuring station and seasonal conditions. The tropospheric delay of the GNSS signal - Zenith Total Delay (ZTD), was analyzed on the examples of three International GNSS Service (IGS) stations at different latitudes. Two epochs in July 2022 and January 2023 for each IGS station are considered regarding seasonal differences in the atmospheric parameters. It was found that at each of the IGS stations, there is an oscillation of the ZTD amplitude with a half-day period. Different patterns were distinguished at each station, depending on the station latitude and epoch, i.e., summer or winter atmospheric conditions. For example, a random walk signal was dominant at the ROAG, San Fernando IGS station.
PB  - Faculty of Civil Engineering, University of Belgrade and Institute of Physics Belgrade, University of Belgrade
C3  - Book of Abstracts and Contributed Papers, International Conference on Recent Trends in Geoscience Research and Applications, Belgrade, October 23–27, 2023
T1  - Tropospheric refraction and its influence through Zenith Total Path Delay at different IGS stations
UR  - https://hdl.handle.net/21.15107/rcub_grafar_3229
ER  - 

@conference{
author = "Vasilić, Violeta and Brajović, Ljiljana and Petković, Dušan and Blagojević, Dragan",
year = "2023",
abstract = "The propagation of the Global Navigation Satellite System (GNSS) signals through the atmosphere is affected by the electron content in the ionosphere and the air density in the electrically neutral troposphere, thus causing a signal delay and leading to errors in the GNSS observations and the estimated positions. 	Our research has been conducted related to the influence of the tropospheric layer of the Earth's atmosphere on signals at geodetic observation stations in the zenith direction. Since tropospheric refraction cannot be directly estimated, the signal delay has been quantified by applying several developed models. As the lowest layer of the atmosphere, the average height of the troposphere is approximately ten kilometers, and it is variable concerning the latitude of the measuring station and seasonal conditions. The tropospheric delay of the GNSS signal - Zenith Total Delay (ZTD), was analyzed on the examples of three International GNSS Service (IGS) stations at different latitudes. Two epochs in July 2022 and January 2023 for each IGS station are considered regarding seasonal differences in the atmospheric parameters. It was found that at each of the IGS stations, there is an oscillation of the ZTD amplitude with a half-day period. Different patterns were distinguished at each station, depending on the station latitude and epoch, i.e., summer or winter atmospheric conditions. For example, a random walk signal was dominant at the ROAG, San Fernando IGS station.",
publisher = "Faculty of Civil Engineering, University of Belgrade and Institute of Physics Belgrade, University of Belgrade",
journal = "Book of Abstracts and Contributed Papers, International Conference on Recent Trends in Geoscience Research and Applications, Belgrade, October 23–27, 2023",
title = "Tropospheric refraction and its influence through Zenith Total Path Delay at different IGS stations",
url = "https://hdl.handle.net/21.15107/rcub_grafar_3229"
}

Vasilić, V., Brajović, L., Petković, D.,& Blagojević, D.. (2023). Tropospheric refraction and its influence through Zenith Total Path Delay at different IGS stations. in Book of Abstracts and Contributed Papers, International Conference on Recent Trends in Geoscience Research and Applications, Belgrade, October 23–27, 2023
Faculty of Civil Engineering, University of Belgrade and Institute of Physics Belgrade, University of Belgrade..
https://hdl.handle.net/21.15107/rcub_grafar_3229

Vasilić V, Brajović L, Petković D, Blagojević D. Tropospheric refraction and its influence through Zenith Total Path Delay at different IGS stations. in Book of Abstracts and Contributed Papers, International Conference on Recent Trends in Geoscience Research and Applications, Belgrade, October 23–27, 2023. 2023;.
https://hdl.handle.net/21.15107/rcub_grafar_3229 .

Vasilić, Violeta, Brajović, Ljiljana, Petković, Dušan, Blagojević, Dragan, "Tropospheric refraction and its influence through Zenith Total Path Delay at different IGS stations" in Book of Abstracts and Contributed Papers, International Conference on Recent Trends in Geoscience Research and Applications, Belgrade, October 23–27, 2023 (2023),
https://hdl.handle.net/21.15107/rcub_grafar_3229 .

TY  - JOUR
AU  - Damljanović, Goran
AU  - Vasilić, Violeta
PY  - 2023
UR  - https://grafar.grf.bg.ac.rs/handle/123456789/3260
AB  - We analyzed the Earth's long-term polar motion using the time series IERS EOP C04 (from 1984 to 2023) to determine the variation of amplitude of the Chandler wobble. To compare the results based on the C04 with the Belgrade latitude data (BLZ series 1949-1985) results, we calculated the variations of latitude at BLZ point using the C04 coordinates (x, y). The secular part of these latitude variations was determined by use of the least-squares method (LSM) and removed from the data to get residuals. We used the Fourier transforms (DFT) to obtain annual and semiannual oscillations and to remove them from the residuals (to get a new set of residuals). These new residuals were divided into 33 independent 1.2 years subintervals. For each subinterval, we calculated the amplitude, period and phase of the Chandler nutation using the LSM. The quasi-periodic instability of 33 values of the amplitude of the Chandler wobble is detected with a period of 54.5 years using LSM (it was 38.5 years from BLZ data 1949-1985); the amplitude of that quasi-periodic variation is 0.″087 (0.″06 from BLZ data). The amplitude of the Chandler nutation varies with a minimum of 0.″012 (at 2019.3) and a maximum of 0.″230 (at 1994.1); the period is stable, but the phase is not stable. We applied the Abbe criterion to explain the variability in 33 values of the Chandler wobble amplitude, and the hypothesis that there is no trend in these 33 values is rejected. The obtained amplitude modulation is in accordance with other published papers about similar subject (and with our results based on BLZ data). Probably, the cause is lying in the hydro-atmospheric circulation that could influence calculated quasi-periodic variation. A possible explanation can be found in changes of core-mantle electromagnetic coupling (in line with the last few years investigations). In recent papers, it has been noticed that the effects of geomagnetic jerks are more important for exciting free nutation than the atmosphere and oceans.
PB  - Astronomska opservatorija i Matematički fakultet - Odeljenje za astronomiju
T2  - Serbian Astronomical Journal
T1  - Measuring Chandler Wobble amplitude
variations using IERS EOP C04 data
IS  - 207
UR  - https://hdl.handle.net/21.15107/rcub_grafar_3260
ER  - 

@article{
author = "Damljanović, Goran and Vasilić, Violeta",
year = "2023",
abstract = "We analyzed the Earth's long-term polar motion using the time series IERS EOP C04 (from 1984 to 2023) to determine the variation of amplitude of the Chandler wobble. To compare the results based on the C04 with the Belgrade latitude data (BLZ series 1949-1985) results, we calculated the variations of latitude at BLZ point using the C04 coordinates (x, y). The secular part of these latitude variations was determined by use of the least-squares method (LSM) and removed from the data to get residuals. We used the Fourier transforms (DFT) to obtain annual and semiannual oscillations and to remove them from the residuals (to get a new set of residuals). These new residuals were divided into 33 independent 1.2 years subintervals. For each subinterval, we calculated the amplitude, period and phase of the Chandler nutation using the LSM. The quasi-periodic instability of 33 values of the amplitude of the Chandler wobble is detected with a period of 54.5 years using LSM (it was 38.5 years from BLZ data 1949-1985); the amplitude of that quasi-periodic variation is 0.″087 (0.″06 from BLZ data). The amplitude of the Chandler nutation varies with a minimum of 0.″012 (at 2019.3) and a maximum of 0.″230 (at 1994.1); the period is stable, but the phase is not stable. We applied the Abbe criterion to explain the variability in 33 values of the Chandler wobble amplitude, and the hypothesis that there is no trend in these 33 values is rejected. The obtained amplitude modulation is in accordance with other published papers about similar subject (and with our results based on BLZ data). Probably, the cause is lying in the hydro-atmospheric circulation that could influence calculated quasi-periodic variation. A possible explanation can be found in changes of core-mantle electromagnetic coupling (in line with the last few years investigations). In recent papers, it has been noticed that the effects of geomagnetic jerks are more important for exciting free nutation than the atmosphere and oceans.",
publisher = "Astronomska opservatorija i Matematički fakultet - Odeljenje za astronomiju",
journal = "Serbian Astronomical Journal",
title = "Measuring Chandler Wobble amplitude
variations using IERS EOP C04 data",
number = "207",
url = "https://hdl.handle.net/21.15107/rcub_grafar_3260"
}

Damljanović, G.,& Vasilić, V.. (2023). Measuring Chandler Wobble amplitude
variations using IERS EOP C04 data. in Serbian Astronomical Journal
Astronomska opservatorija i Matematički fakultet - Odeljenje za astronomiju.(207).
https://hdl.handle.net/21.15107/rcub_grafar_3260

Damljanović G, Vasilić V. Measuring Chandler Wobble amplitude
variations using IERS EOP C04 data. in Serbian Astronomical Journal. 2023;(207).
https://hdl.handle.net/21.15107/rcub_grafar_3260 .

Damljanović, Goran, Vasilić, Violeta, "Measuring Chandler Wobble amplitude
variations using IERS EOP C04 data" in Serbian Astronomical Journal, no. 207 (2023),
https://hdl.handle.net/21.15107/rcub_grafar_3260 .

TY  - GEN
AU  - Lucca, E.
AU  - Avellán, T.
AU  - Kofinas, D.
AU  - Baganz, G. F. M.
AU  - Baubekova, A.
AU  - Blicharska, M.
AU  - Calheiros, C.
AU  - Castelli, G.
AU  - Dašić, T.
AU  - Đorđević, D.
AU  - el Jeitany, J.
AU  - Fader, M.
AU  - Hassan, R.
AU  - Kleemann, J.
AU  - Liu, H.-Y.
AU  - Masia, S.
AU  - Merheb, M.
AU  - Milliken, S.
AU  - Mooren, C. E.
AU  - Oinonen, S.
AU  - Oral, H. V.
AU  - Pagano, A.
AU  - Pineda-Martos, R.
AU  - Psomas, A.
AU  - Rađenović, T.
AU  - Das, S. S.
AU  - Sambo, B.
AU  - Sperotto, A.
AU  - Spyropoulou, A.
AU  - Stefanakis, A.
AU  - Suškevičs, M.
AU  - Sušnik, J.
AU  - Taiwo Temitope, B.
AU  - Teutschbein, C.
AU  - Vasilić, V.
AU  - Munaretto, S.
AU  - Brouwer, F.
AU  - Laspidou, C.
PY  - 2023
UR  - https://grafar.grf.bg.ac.rs/handle/123456789/3179
AB  - Integrated approaches for managing natural resources are needed to meet the increasing demand for freshwater, energy and food, while, in parallel, mitigating and adapting to climate change, maintaining the integrity of ecosystems, and ensuring equitable access to resources. The Water-Energy-Food (WEF) Nexus has been proposed as a cross-sectoral approach to understand, analyse, and manage the complex trade-offs and exploit synergies that arise among these resource sectors. Although not initially included as a component of the Nexus, the importance of ecosystems in supporting water, energy and food security is increasingly recognised by the Nexus community of researchers and practitioners. However, attempts to conceptually integrate Ecosystems into the Nexus have yet to converge into a common framework. A group of natural resources management researchers, system thinkers and ecosystem services experts from the European network COST Action CA20138 NEXUSNET have compiled and investigated the various approaches for integrating ecosystems in the WEF Nexus. By combining literature analysis with interdisciplinary workshops – one of which was held in a hybrid format (in person and online) at the University of Oulu, Finland, in September 2022 – we reveal a multiplicity of concepts utilised to represent, partially or fully, ecosystems in the Nexus, namely “natural environment”, “ecosystem services” and “biodiversity”. Disparity was also found in the role attributed to ecosystems in the Nexus framework, being it an underlying layer from which resources for Nexus sectors are extracted or the pillar of an expanded Nexus system – i.e., the WEF-Ecosystems Nexus. Through this collaborative effort, we present possible advantages and disadvantages of adopting differential  WEF-Ecosystems Nexus approaches, highlighting their potential complementarity and integration to support future advancement of Nexus research. In the oral presentation, we will show our preliminary findings and encourage the exchange of ideas and feedback from the different scientific disciplines present at the CEMEPE Conference.
T1  - Incorporating Ecosystems in the Water-Energy-Food Nexus: Current Perspective and Future Directions
UR  - https://hdl.handle.net/21.15107/rcub_grafar_3179
ER  - 

@misc{
author = "Lucca, E. and Avellán, T. and Kofinas, D. and Baganz, G. F. M. and Baubekova, A. and Blicharska, M. and Calheiros, C. and Castelli, G. and Dašić, T. and Đorđević, D. and el Jeitany, J. and Fader, M. and Hassan, R. and Kleemann, J. and Liu, H.-Y. and Masia, S. and Merheb, M. and Milliken, S. and Mooren, C. E. and Oinonen, S. and Oral, H. V. and Pagano, A. and Pineda-Martos, R. and Psomas, A. and Rađenović, T. and Das, S. S. and Sambo, B. and Sperotto, A. and Spyropoulou, A. and Stefanakis, A. and Suškevičs, M. and Sušnik, J. and Taiwo Temitope, B. and Teutschbein, C. and Vasilić, V. and Munaretto, S. and Brouwer, F. and Laspidou, C.",
year = "2023",
abstract = "Integrated approaches for managing natural resources are needed to meet the increasing demand for freshwater, energy and food, while, in parallel, mitigating and adapting to climate change, maintaining the integrity of ecosystems, and ensuring equitable access to resources. The Water-Energy-Food (WEF) Nexus has been proposed as a cross-sectoral approach to understand, analyse, and manage the complex trade-offs and exploit synergies that arise among these resource sectors. Although not initially included as a component of the Nexus, the importance of ecosystems in supporting water, energy and food security is increasingly recognised by the Nexus community of researchers and practitioners. However, attempts to conceptually integrate Ecosystems into the Nexus have yet to converge into a common framework. A group of natural resources management researchers, system thinkers and ecosystem services experts from the European network COST Action CA20138 NEXUSNET have compiled and investigated the various approaches for integrating ecosystems in the WEF Nexus. By combining literature analysis with interdisciplinary workshops – one of which was held in a hybrid format (in person and online) at the University of Oulu, Finland, in September 2022 – we reveal a multiplicity of concepts utilised to represent, partially or fully, ecosystems in the Nexus, namely “natural environment”, “ecosystem services” and “biodiversity”. Disparity was also found in the role attributed to ecosystems in the Nexus framework, being it an underlying layer from which resources for Nexus sectors are extracted or the pillar of an expanded Nexus system – i.e., the WEF-Ecosystems Nexus. Through this collaborative effort, we present possible advantages and disadvantages of adopting differential  WEF-Ecosystems Nexus approaches, highlighting their potential complementarity and integration to support future advancement of Nexus research. In the oral presentation, we will show our preliminary findings and encourage the exchange of ideas and feedback from the different scientific disciplines present at the CEMEPE Conference.",
title = "Incorporating Ecosystems in the Water-Energy-Food Nexus: Current Perspective and Future Directions",
url = "https://hdl.handle.net/21.15107/rcub_grafar_3179"
}

Lucca, E., Avellán, T., Kofinas, D., Baganz, G. F. M., Baubekova, A., Blicharska, M., Calheiros, C., Castelli, G., Dašić, T., Đorđević, D., el Jeitany, J., Fader, M., Hassan, R., Kleemann, J., Liu, H.-Y., Masia, S., Merheb, M., Milliken, S., Mooren, C. E., Oinonen, S., Oral, H. V., Pagano, A., Pineda-Martos, R., Psomas, A., Rađenović, T., Das, S. S., Sambo, B., Sperotto, A., Spyropoulou, A., Stefanakis, A., Suškevičs, M., Sušnik, J., Taiwo Temitope, B., Teutschbein, C., Vasilić, V., Munaretto, S., Brouwer, F.,& Laspidou, C.. (2023). Incorporating Ecosystems in the Water-Energy-Food Nexus: Current Perspective and Future Directions. .
https://hdl.handle.net/21.15107/rcub_grafar_3179

Lucca E, Avellán T, Kofinas D, Baganz GFM, Baubekova A, Blicharska M, Calheiros C, Castelli G, Dašić T, Đorđević D, el Jeitany J, Fader M, Hassan R, Kleemann J, Liu H, Masia S, Merheb M, Milliken S, Mooren CE, Oinonen S, Oral HV, Pagano A, Pineda-Martos R, Psomas A, Rađenović T, Das SS, Sambo B, Sperotto A, Spyropoulou A, Stefanakis A, Suškevičs M, Sušnik J, Taiwo Temitope B, Teutschbein C, Vasilić V, Munaretto S, Brouwer F, Laspidou C. Incorporating Ecosystems in the Water-Energy-Food Nexus: Current Perspective and Future Directions. 2023;.
https://hdl.handle.net/21.15107/rcub_grafar_3179 .

Lucca, E., Avellán, T., Kofinas, D., Baganz, G. F. M., Baubekova, A., Blicharska, M., Calheiros, C., Castelli, G., Dašić, T., Đorđević, D., el Jeitany, J., Fader, M., Hassan, R., Kleemann, J., Liu, H.-Y., Masia, S., Merheb, M., Milliken, S., Mooren, C. E., Oinonen, S., Oral, H. V., Pagano, A., Pineda-Martos, R., Psomas, A., Rađenović, T., Das, S. S., Sambo, B., Sperotto, A., Spyropoulou, A., Stefanakis, A., Suškevičs, M., Sušnik, J., Taiwo Temitope, B., Teutschbein, C., Vasilić, V., Munaretto, S., Brouwer, F., Laspidou, C., "Incorporating Ecosystems in the Water-Energy-Food Nexus: Current Perspective and Future Directions" (2023),
https://hdl.handle.net/21.15107/rcub_grafar_3179 .

TY  - CONF
AU  - Vasilić, Violeta
AU  - Brajović, Ljiljana
PY  - 2022
UR  - https://grafar.grf.bg.ac.rs/handle/123456789/2844
AB  - The electro-optical distance measurement (EDM) instruments are widely used not only in geodesy but also in almost all engineering disciplines and related projects. High accuracy length measurements are required especially for different engineering works in urban areas. The paper will present the sources of errors which originate from the atmospheric conditions present in the process of measuring lengths with electro-optical light wave EDM.  First, the working principle based on phase difference measurements and the basic components of EDM are described. 
Atmospheric influence parameters, temperature, atmospheric pressure and air humidity, their impact on the EDM measurements and the formulae recommended by IAG Resolution 3 adopted at the XXIIth General Assembly for the calculating the atmospheric influences are presented. 
The atmospheric influence parameters were treated as well-understood effect from a metrological point of view in according with the GUM - Part 6: Developing and using measurement models. Sensors with an appropriate resolution for measure temperature, atmospheric pressure and air humidity are used in this research.
The first velocity correction estimate is based in part on the a priori known wavelength of the oscillator of the electro-optical EDM instrument and in part on the measured atmospheric parameters. Depending on the frequency bandwidth, as well as, the values of the measured lengths, the group refractive index of air and the first velocity correction is calculated for two EDM instruments Wild DI 20 and Leica TS30.
The values of errors in distance measurements both for the shorter distances up to 500 m and longer distances up to 2 km in the case that temperature, pressure and air humidity influence are not accurately represented in real conditions are given and discussed.
It is shown that first velocity corrections increase with temperature for all measured distances for both types of EDM instruments. Based on the comparison of correction errors for Wild DI 20 and Leica TS 30 instruments, it was concluded that the correction errors in both cases of measurement at lower and higher temperatures than nominal are less for the Wild DI 20 instrument.
PB  - International Federation of Surveyors, FIG
T1  - The impact of the Atmospheric Parameters at Electrooptical Distance Measurements
UR  - https://hdl.handle.net/21.15107/rcub_grafar_2844
ER  - 

@conference{
author = "Vasilić, Violeta and Brajović, Ljiljana",
year = "2022",
abstract = "The electro-optical distance measurement (EDM) instruments are widely used not only in geodesy but also in almost all engineering disciplines and related projects. High accuracy length measurements are required especially for different engineering works in urban areas. The paper will present the sources of errors which originate from the atmospheric conditions present in the process of measuring lengths with electro-optical light wave EDM.  First, the working principle based on phase difference measurements and the basic components of EDM are described. 
Atmospheric influence parameters, temperature, atmospheric pressure and air humidity, their impact on the EDM measurements and the formulae recommended by IAG Resolution 3 adopted at the XXIIth General Assembly for the calculating the atmospheric influences are presented. 
The atmospheric influence parameters were treated as well-understood effect from a metrological point of view in according with the GUM - Part 6: Developing and using measurement models. Sensors with an appropriate resolution for measure temperature, atmospheric pressure and air humidity are used in this research.
The first velocity correction estimate is based in part on the a priori known wavelength of the oscillator of the electro-optical EDM instrument and in part on the measured atmospheric parameters. Depending on the frequency bandwidth, as well as, the values of the measured lengths, the group refractive index of air and the first velocity correction is calculated for two EDM instruments Wild DI 20 and Leica TS30.
The values of errors in distance measurements both for the shorter distances up to 500 m and longer distances up to 2 km in the case that temperature, pressure and air humidity influence are not accurately represented in real conditions are given and discussed.
It is shown that first velocity corrections increase with temperature for all measured distances for both types of EDM instruments. Based on the comparison of correction errors for Wild DI 20 and Leica TS 30 instruments, it was concluded that the correction errors in both cases of measurement at lower and higher temperatures than nominal are less for the Wild DI 20 instrument.",
publisher = "International Federation of Surveyors, FIG",
title = "The impact of the Atmospheric Parameters at Electrooptical Distance Measurements",
url = "https://hdl.handle.net/21.15107/rcub_grafar_2844"
}

Vasilić, V.,& Brajović, L.. (2022). The impact of the Atmospheric Parameters at Electrooptical Distance Measurements. 
International Federation of Surveyors, FIG..
https://hdl.handle.net/21.15107/rcub_grafar_2844

Vasilić V, Brajović L. The impact of the Atmospheric Parameters at Electrooptical Distance Measurements. 2022;.
https://hdl.handle.net/21.15107/rcub_grafar_2844 .

Vasilić, Violeta, Brajović, Ljiljana, "The impact of the Atmospheric Parameters at Electrooptical Distance Measurements" (2022),
https://hdl.handle.net/21.15107/rcub_grafar_2844 .

TY  - GEN
AU  - Vasilić, Violeta
AU  - Blagojević, Dragan
AU  - Marinković, Marko
PY  - 2022
UR  - https://grafar.grf.bg.ac.rs/handle/123456789/3254
AB  - The main source of the seismic energy on the territory of the Republic of Serbia is connected with the primary tectonic contact between the Eurasian and African/Arabian plates along the coast of the Adriatic Sea and the Balkan Peninsula. This geotectonic collision -compression contact represents a source of tectonic stress whose accumulated energy is transmitting to his background and is realized in the form of earthquakes. 
Based on the available seismic hazard maps, considering both different return periods of macroseismic intensity and different seismic zones, displacement fields of various civil engineering structures (i.e. large reinforced concrete frame or shear wall buildings, bridge structures etc.) will be assessed using an approach based on the precise geodetic observations.
The permanent CORS GPS network of Serbia with an average stations distance of 60 km is used as a basis for monitoring and determining the values of ground deformations and objects displacements. The permanent stations network will be more spatially densified in each specific area by the appropriate stations of the SREF network (average stations distance 10 km) and the local network points of the civil engineering structures individually. 
In this way each local stations network of the construction objects particularly, should be specially designed depending on the given conditions of this civil engineering structures which will allow a better understanding of seismological impacts.
T2  - 20th WEGENER GENERAL ASSEMBLY, Measuring and Modelling our Dznamic Planet, Integration of Geodetic, Tectonic and Seismological Data to Better Understand Earthquakes and The Earthquake Cycle
T1  - Contribution to better understanding of seismological impacts in large civil engineering structures
UR  - https://hdl.handle.net/21.15107/rcub_grafar_3254
ER  - 

@misc{
author = "Vasilić, Violeta and Blagojević, Dragan and Marinković, Marko",
year = "2022",
abstract = "The main source of the seismic energy on the territory of the Republic of Serbia is connected with the primary tectonic contact between the Eurasian and African/Arabian plates along the coast of the Adriatic Sea and the Balkan Peninsula. This geotectonic collision -compression contact represents a source of tectonic stress whose accumulated energy is transmitting to his background and is realized in the form of earthquakes. 
Based on the available seismic hazard maps, considering both different return periods of macroseismic intensity and different seismic zones, displacement fields of various civil engineering structures (i.e. large reinforced concrete frame or shear wall buildings, bridge structures etc.) will be assessed using an approach based on the precise geodetic observations.
The permanent CORS GPS network of Serbia with an average stations distance of 60 km is used as a basis for monitoring and determining the values of ground deformations and objects displacements. The permanent stations network will be more spatially densified in each specific area by the appropriate stations of the SREF network (average stations distance 10 km) and the local network points of the civil engineering structures individually. 
In this way each local stations network of the construction objects particularly, should be specially designed depending on the given conditions of this civil engineering structures which will allow a better understanding of seismological impacts.",
journal = "20th WEGENER GENERAL ASSEMBLY, Measuring and Modelling our Dznamic Planet, Integration of Geodetic, Tectonic and Seismological Data to Better Understand Earthquakes and The Earthquake Cycle",
title = "Contribution to better understanding of seismological impacts in large civil engineering structures",
url = "https://hdl.handle.net/21.15107/rcub_grafar_3254"
}

Vasilić, V., Blagojević, D.,& Marinković, M.. (2022). Contribution to better understanding of seismological impacts in large civil engineering structures. in 20th WEGENER GENERAL ASSEMBLY, Measuring and Modelling our Dznamic Planet, Integration of Geodetic, Tectonic and Seismological Data to Better Understand Earthquakes and The Earthquake Cycle.
https://hdl.handle.net/21.15107/rcub_grafar_3254

Vasilić V, Blagojević D, Marinković M. Contribution to better understanding of seismological impacts in large civil engineering structures. in 20th WEGENER GENERAL ASSEMBLY, Measuring and Modelling our Dznamic Planet, Integration of Geodetic, Tectonic and Seismological Data to Better Understand Earthquakes and The Earthquake Cycle. 2022;.
https://hdl.handle.net/21.15107/rcub_grafar_3254 .

Vasilić, Violeta, Blagojević, Dragan, Marinković, Marko, "Contribution to better understanding of seismological impacts in large civil engineering structures" in 20th WEGENER GENERAL ASSEMBLY, Measuring and Modelling our Dznamic Planet, Integration of Geodetic, Tectonic and Seismological Data to Better Understand Earthquakes and The Earthquake Cycle (2022),
https://hdl.handle.net/21.15107/rcub_grafar_3254 .

TY  - THES
AU  - Vasilić, Violeta M.
PY  - 2016
UR  - http://eteze.bg.ac.rs/application/showtheses?thesesId=4904
UR  - https://fedorabg.bg.ac.rs/fedora/get/o:15357/bdef:Content/download
UR  - http://vbs.rs/scripts/cobiss?command=DISPLAY&base=70036&RID=513733522
UR  - http://nardus.mpn.gov.rs/123456789/7994
UR  - https://grafar.grf.bg.ac.rs/handle/123456789/1705
AB  - Ова дисертација је урађена у контексту наставка геодетских истраживања реализације и стабилности односно временске еволуције Tерестричког Референтног Система и савремених померања Земљине коре регионалног карактера која се изводе у оквиру уже научне области Референтне геодетске мреже за коју је матичан Грађевински факултет Универзитета у Београду.Земљина кора као највиши део у структурној грађи Земље трпи промене под истовременим и супростављеним дејством ендогених и егзогених процеса. Према моделу тектонике плоча Земљина кора је подељена у одређен број танких, крутих плоча које се крећу једна у односу на другу и чије су границе дефинисане сеизмичком активношћу. Висока прецизност позиционирања остварена данас помоћу просторних геодетских техника VLBI, SLR, GPS и DORIS омогућила је добијање информација о кинематици тектонских плоча на основу поновљених или континуираних опажања...
AB  - This PhD. thesis is done in the context of continuing geodetic research and realization of stability and temporal evolution of the Terrestrial Reference System and recent displacement of the Earth's crust which have a regional character that are perform within the scientific geodetic field the Geodetic Reference Network for which is academically competent the Faculty of Civil Engineering of the University of Belgrade.As the highest part of the structural composition of the Earth, the Earth's crust suffer changes under the simultaneous and opposed effects of endogenous and exogenous processes. According to the model of plate tectonics, the Earth's crust is divided into a some number of thin, rigid plates that have a relative motion, i.e. the one in relation to another plate, and have boundaries that are defined by seismic activity. High precision of positioning achieved today with the spatial geodetic techniques VLBI, SLR, GPS and DORIS, enabled to obtain the information on kinematics of tectonic plates on the basis of repeated or continuous observations...
PB  - Универзитет у Београду, Грађевински факултет
T2  - Универзитет у Београду
T1  - Моделирање регионалних деформација земљине коре и стабилности референтног система
UR  - https://hdl.handle.net/21.15107/rcub_nardus_7994
ER  - 

@phdthesis{
author = "Vasilić, Violeta M.",
year = "2016",
abstract = "Ова дисертација је урађена у контексту наставка геодетских истраживања реализације и стабилности односно временске еволуције Tерестричког Референтног Система и савремених померања Земљине коре регионалног карактера која се изводе у оквиру уже научне области Референтне геодетске мреже за коју је матичан Грађевински факултет Универзитета у Београду.Земљина кора као највиши део у структурној грађи Земље трпи промене под истовременим и супростављеним дејством ендогених и егзогених процеса. Према моделу тектонике плоча Земљина кора је подељена у одређен број танких, крутих плоча које се крећу једна у односу на другу и чије су границе дефинисане сеизмичком активношћу. Висока прецизност позиционирања остварена данас помоћу просторних геодетских техника VLBI, SLR, GPS и DORIS омогућила је добијање информација о кинематици тектонских плоча на основу поновљених или континуираних опажања..., This PhD. thesis is done in the context of continuing geodetic research and realization of stability and temporal evolution of the Terrestrial Reference System and recent displacement of the Earth's crust which have a regional character that are perform within the scientific geodetic field the Geodetic Reference Network for which is academically competent the Faculty of Civil Engineering of the University of Belgrade.As the highest part of the structural composition of the Earth, the Earth's crust suffer changes under the simultaneous and opposed effects of endogenous and exogenous processes. According to the model of plate tectonics, the Earth's crust is divided into a some number of thin, rigid plates that have a relative motion, i.e. the one in relation to another plate, and have boundaries that are defined by seismic activity. High precision of positioning achieved today with the spatial geodetic techniques VLBI, SLR, GPS and DORIS, enabled to obtain the information on kinematics of tectonic plates on the basis of repeated or continuous observations...",
publisher = "Универзитет у Београду, Грађевински факултет",
journal = "Универзитет у Београду",
title = "Моделирање регионалних деформација земљине коре и стабилности референтног система",
url = "https://hdl.handle.net/21.15107/rcub_nardus_7994"
}

Vasilić, V. M.. (2016). Моделирање регионалних деформација земљине коре и стабилности референтног система. in Универзитет у Београду
Универзитет у Београду, Грађевински факултет..
https://hdl.handle.net/21.15107/rcub_nardus_7994

Vasilić VM. Моделирање регионалних деформација земљине коре и стабилности референтног система. in Универзитет у Београду. 2016;.
https://hdl.handle.net/21.15107/rcub_nardus_7994 .

Vasilić, Violeta M., "Моделирање регионалних деформација земљине коре и стабилности референтног система" in Универзитет у Београду (2016),
https://hdl.handle.net/21.15107/rcub_nardus_7994 .

TY  - CHAP
AU  - Vasilić, Violeta
AU  - Blagojević, Dragan
PY  - 2015
UR  - https://grafar.grf.bg.ac.rs/handle/123456789/1034
PB  - Cham: Springer International Publishing
T2  - IAG 150 Years
T1  - Expression of the Local GPS Solution in the Regional Reference Frame ETRF2000
EP  - 116
SP  - 111
VL  - 143
DO  - 10.1007/1345_2015_34
ER  - 

@inbook{
author = "Vasilić, Violeta and Blagojević, Dragan",
year = "2015",
publisher = "Cham: Springer International Publishing",
journal = "IAG 150 Years",
booktitle = "Expression of the Local GPS Solution in the Regional Reference Frame ETRF2000",
pages = "116-111",
volume = "143",
doi = "10.1007/1345_2015_34"
}

Vasilić, V.,& Blagojević, D.. (2015). Expression of the Local GPS Solution in the Regional Reference Frame ETRF2000. in IAG 150 Years
Cham: Springer International Publishing., 143, 111-116.
https://doi.org/10.1007/1345_2015_34

Vasilić V, Blagojević D. Expression of the Local GPS Solution in the Regional Reference Frame ETRF2000. in IAG 150 Years. 2015;143:111-116.
doi:10.1007/1345_2015_34 .

Vasilić, Violeta, Blagojević, Dragan, "Expression of the Local GPS Solution in the Regional Reference Frame ETRF2000" in IAG 150 Years, 143 (2015):111-116,
https://doi.org/10.1007/1345_2015_34 . .

TY  - CONF
AU  - Mihajlović, Rajica
AU  - Šoškić, Mladen
AU  - Višnjevac, Nenad
AU  - Vasilić, Violeta
PY  - 2014
UR  - https://grafar.grf.bg.ac.rs/handle/123456789/1249
PB  - Univerzitet Crne Gore, Građevinski fakultet, Podgorica
C3  - Zbornik radova / Peti Internacionalni naučno-stručni skup Građevinarstvo nauka i praksa
T1  - Savremeni aspekti uređenja seoskog prostora - mogući modeli
EP  - 1444
SP  - 1437
UR  - https://hdl.handle.net/21.15107/rcub_grafar_1249
ER  - 

@conference{
author = "Mihajlović, Rajica and Šoškić, Mladen and Višnjevac, Nenad and Vasilić, Violeta",
year = "2014",
publisher = "Univerzitet Crne Gore, Građevinski fakultet, Podgorica",
journal = "Zbornik radova / Peti Internacionalni naučno-stručni skup Građevinarstvo nauka i praksa",
title = "Savremeni aspekti uređenja seoskog prostora - mogući modeli",
pages = "1444-1437",
url = "https://hdl.handle.net/21.15107/rcub_grafar_1249"
}

Mihajlović, R., Šoškić, M., Višnjevac, N.,& Vasilić, V.. (2014). Savremeni aspekti uređenja seoskog prostora - mogući modeli. in Zbornik radova / Peti Internacionalni naučno-stručni skup Građevinarstvo nauka i praksa
Univerzitet Crne Gore, Građevinski fakultet, Podgorica., 1437-1444.
https://hdl.handle.net/21.15107/rcub_grafar_1249

Mihajlović R, Šoškić M, Višnjevac N, Vasilić V. Savremeni aspekti uređenja seoskog prostora - mogući modeli. in Zbornik radova / Peti Internacionalni naučno-stručni skup Građevinarstvo nauka i praksa. 2014;:1437-1444.
https://hdl.handle.net/21.15107/rcub_grafar_1249 .

Mihajlović, Rajica, Šoškić, Mladen, Višnjevac, Nenad, Vasilić, Violeta, "Savremeni aspekti uređenja seoskog prostora - mogući modeli" in Zbornik radova / Peti Internacionalni naučno-stručni skup Građevinarstvo nauka i praksa (2014):1437-1444,
https://hdl.handle.net/21.15107/rcub_grafar_1249 .

TY  - CONF
AU  - Mihajlović, Rajica
AU  - Šoškić, Mladen
AU  - Višnjevac, Nenad
AU  - Vasilić, Violeta
PY  - 2014
UR  - https://grafar.grf.bg.ac.rs/handle/123456789/1269
PB  - Univerzitet Crne Gore, Građevinski fakultet, Podgorica
C3  - Zbornik radova / Peti Internacionalni naučno-stručni skup Građevinarstvo nauka i praksa
T1  - Savremeni aspekti uređenja seoskog prostora - osnovni pristupi
EP  - 1436
SP  - 1431
UR  - https://hdl.handle.net/21.15107/rcub_grafar_1269
ER  - 

@conference{
author = "Mihajlović, Rajica and Šoškić, Mladen and Višnjevac, Nenad and Vasilić, Violeta",
year = "2014",
publisher = "Univerzitet Crne Gore, Građevinski fakultet, Podgorica",
journal = "Zbornik radova / Peti Internacionalni naučno-stručni skup Građevinarstvo nauka i praksa",
title = "Savremeni aspekti uređenja seoskog prostora - osnovni pristupi",
pages = "1436-1431",
url = "https://hdl.handle.net/21.15107/rcub_grafar_1269"
}

Mihajlović, R., Šoškić, M., Višnjevac, N.,& Vasilić, V.. (2014). Savremeni aspekti uređenja seoskog prostora - osnovni pristupi. in Zbornik radova / Peti Internacionalni naučno-stručni skup Građevinarstvo nauka i praksa
Univerzitet Crne Gore, Građevinski fakultet, Podgorica., 1431-1436.
https://hdl.handle.net/21.15107/rcub_grafar_1269

Mihajlović R, Šoškić M, Višnjevac N, Vasilić V. Savremeni aspekti uređenja seoskog prostora - osnovni pristupi. in Zbornik radova / Peti Internacionalni naučno-stručni skup Građevinarstvo nauka i praksa. 2014;:1431-1436.
https://hdl.handle.net/21.15107/rcub_grafar_1269 .

Mihajlović, Rajica, Šoškić, Mladen, Višnjevac, Nenad, Vasilić, Violeta, "Savremeni aspekti uređenja seoskog prostora - osnovni pristupi" in Zbornik radova / Peti Internacionalni naučno-stručni skup Građevinarstvo nauka i praksa (2014):1431-1436,
https://hdl.handle.net/21.15107/rcub_grafar_1269 .

TY  - CONF
AU  - Odalović, Oleg
AU  - Grekulović, Sanja
AU  - Al-gharabli, Hamza
AU  - Blagojević, Dragan
AU  - Vasilić, Violeta
AU  - Naod, Sofija
PY  - 2013
UR  - https://grafar.grf.bg.ac.rs/handle/123456789/2237
AB  - This study compares a series of global geopotential models (GGMs) using
available terrestrial data from the territory of Libya. The anomalies of free air were
determined in points of gravimetric survey of Libya by using the model of European Improved
Gravity 6C2 (EIGEN-6C2), the model of the Earth Gravitational Model 2008 (EGM2008), as
well as model of the Earth Gravitational Model 1996 (EGM96). The points of gravimetric
survey of Libya are related to International Terrestrial Reference Frame (ITRF2000),
Geodetic Reference System 1980 (GRS80), International Gravity Standardization Net 1971
(IGSN71) and the levelling network of Libya. Free air anomalies were evaluated at the points
of gravimetric survey. Along with all mentioned above the results gained by using said models
were separately compared with the data obtained by using the Earth Gravitational Model
(EGM96).
PB  - RevCAD Journal of Geodesy and Cadastre
C3  - GEOMAT 2013, Scientific Conference with International Participation, Romania
T1  - Comparison of global geopotential models with Terrestrial gravity data in Libya
SP  - 181
UR  - https://hdl.handle.net/21.15107/rcub_grafar_2237
ER  - 

@conference{
author = "Odalović, Oleg and Grekulović, Sanja and Al-gharabli, Hamza and Blagojević, Dragan and Vasilić, Violeta and Naod, Sofija",
year = "2013",
abstract = "This study compares a series of global geopotential models (GGMs) using
available terrestrial data from the territory of Libya. The anomalies of free air were
determined in points of gravimetric survey of Libya by using the model of European Improved
Gravity 6C2 (EIGEN-6C2), the model of the Earth Gravitational Model 2008 (EGM2008), as
well as model of the Earth Gravitational Model 1996 (EGM96). The points of gravimetric
survey of Libya are related to International Terrestrial Reference Frame (ITRF2000),
Geodetic Reference System 1980 (GRS80), International Gravity Standardization Net 1971
(IGSN71) and the levelling network of Libya. Free air anomalies were evaluated at the points
of gravimetric survey. Along with all mentioned above the results gained by using said models
were separately compared with the data obtained by using the Earth Gravitational Model
(EGM96).",
publisher = "RevCAD Journal of Geodesy and Cadastre",
journal = "GEOMAT 2013, Scientific Conference with International Participation, Romania",
title = "Comparison of global geopotential models with Terrestrial gravity data in Libya",
pages = "181",
url = "https://hdl.handle.net/21.15107/rcub_grafar_2237"
}

Odalović, O., Grekulović, S., Al-gharabli, H., Blagojević, D., Vasilić, V.,& Naod, S.. (2013). Comparison of global geopotential models with Terrestrial gravity data in Libya. in GEOMAT 2013, Scientific Conference with International Participation, Romania
RevCAD Journal of Geodesy and Cadastre., 181.
https://hdl.handle.net/21.15107/rcub_grafar_2237

Odalović O, Grekulović S, Al-gharabli H, Blagojević D, Vasilić V, Naod S. Comparison of global geopotential models with Terrestrial gravity data in Libya. in GEOMAT 2013, Scientific Conference with International Participation, Romania. 2013;:181.
https://hdl.handle.net/21.15107/rcub_grafar_2237 .

Odalović, Oleg, Grekulović, Sanja, Al-gharabli, Hamza, Blagojević, Dragan, Vasilić, Violeta, Naod, Sofija, "Comparison of global geopotential models with Terrestrial gravity data in Libya" in GEOMAT 2013, Scientific Conference with International Participation, Romania (2013):181,
https://hdl.handle.net/21.15107/rcub_grafar_2237 .

TY  - CONF
AU  - Naod, Sofija
AU  - Grekulović, Sanja
AU  - Vasilić, Violeta
AU  - Odalović, Oleg
AU  - Blagojević, Dragan
PY  - 2013
UR  - https://grafar.grf.bg.ac.rs/handle/123456789/2236
AB  - National GPS permanent network of Serbia - Aktivna Geodetska Referentna Osnova Srbije (AGROS) was established in the end of 2005. referring to the ITRF96, where the official geodetic reference system of Serbia was Bessel ellipsoid and Gauss-Krüger projec-tion. The new reference system ETRS89, through its realization ETRF2000 was introduced from 1th January 2011, according to the Law of the State Survey and Cadastre. This paper describes the main activities for the establishement of new Terrestrial Reference Frame, both from mathematical and practical point of views, and in particular station velocity of AGROS network.
PB  - Državna geodetska uprava, Gruška 20, HR-10000 Zagreb
PB  - Sveučilište u Zagrebu Geodetski fakultet, Kačićeva 26, HR-10000 Zagreb
PB  - Hrvatska komora ovlaštenih inženjera geodezije, Ul. Grada Vukovara 271/II, HR-10000 Zagreb
C3  - Zbornik radova 3. CROPOS konferencije
T1  - Terrestrial reference frame of Serbia and its temporal rate
SP  - 70
UR  - https://hdl.handle.net/21.15107/rcub_grafar_2236
ER  - 

@conference{
author = "Naod, Sofija and Grekulović, Sanja and Vasilić, Violeta and Odalović, Oleg and Blagojević, Dragan",
year = "2013",
abstract = "National GPS permanent network of Serbia - Aktivna Geodetska Referentna Osnova Srbije (AGROS) was established in the end of 2005. referring to the ITRF96, where the official geodetic reference system of Serbia was Bessel ellipsoid and Gauss-Krüger projec-tion. The new reference system ETRS89, through its realization ETRF2000 was introduced from 1th January 2011, according to the Law of the State Survey and Cadastre. This paper describes the main activities for the establishement of new Terrestrial Reference Frame, both from mathematical and practical point of views, and in particular station velocity of AGROS network.",
publisher = "Državna geodetska uprava, Gruška 20, HR-10000 Zagreb, Sveučilište u Zagrebu Geodetski fakultet, Kačićeva 26, HR-10000 Zagreb, Hrvatska komora ovlaštenih inženjera geodezije, Ul. Grada Vukovara 271/II, HR-10000 Zagreb",
journal = "Zbornik radova 3. CROPOS konferencije",
title = "Terrestrial reference frame of Serbia and its temporal rate",
pages = "70",
url = "https://hdl.handle.net/21.15107/rcub_grafar_2236"
}

Naod, S., Grekulović, S., Vasilić, V., Odalović, O.,& Blagojević, D.. (2013). Terrestrial reference frame of Serbia and its temporal rate. in Zbornik radova 3. CROPOS konferencije
Državna geodetska uprava, Gruška 20, HR-10000 Zagreb., 70.
https://hdl.handle.net/21.15107/rcub_grafar_2236

Naod S, Grekulović S, Vasilić V, Odalović O, Blagojević D. Terrestrial reference frame of Serbia and its temporal rate. in Zbornik radova 3. CROPOS konferencije. 2013;:70.
https://hdl.handle.net/21.15107/rcub_grafar_2236 .

Naod, Sofija, Grekulović, Sanja, Vasilić, Violeta, Odalović, Oleg, Blagojević, Dragan, "Terrestrial reference frame of Serbia and its temporal rate" in Zbornik radova 3. CROPOS konferencije (2013):70,
https://hdl.handle.net/21.15107/rcub_grafar_2236 .

TY  - CHAP
AU  - Blagojević, Dragan
AU  - Vasilić, Violeta
PY  - 2013
UR  - https://link.springer.com/chapter/10.1007%2F978-3-642-32998-2_21
UR  - https://grafar.grf.bg.ac.rs/handle/123456789/1934
AB  - Сажетак: У раду су приказани прелиминарни резултати анализе временских серија координата перманентне GNSS мреже станица Србије. Приказана је методологија анализе и кратко су објашњене резултујуће брзине станица. Тренд крусталне деформације је јасно идентификован, иако је коришћен кратки временски интервал, потврђујући тако могућности мреже перманентних станица за локалне и регионалне геодинамичке студије. Abstract. The paper presents preliminary results of coordinate time series analysis in the Serbian network of permanent GNSS stations. The analysis methodology is outlined and resulting station velocities are briefly commented. Despite the short time span used, the crustal deformation trend was clearly identified, confirming the potential of the network of permanent stations for local and regional geodynamical studies.
PB  - International Association of Geodesy, Zuheir Altamimi, Xavier  Collilieux
T2  - Reference Frames for Applications in Geosciences (Part III: Definition, Establishment, Maintenance and Integration of Regional Reference Frames)
T1  - The First Insight into Station Velocities in Republic of Serbia
VL  - 138
DO  - 10.1007/978-3-642-32998-2_21
ER  - 

@inbook{
author = "Blagojević, Dragan and Vasilić, Violeta",
year = "2013",
abstract = "Сажетак: У раду су приказани прелиминарни резултати анализе временских серија координата перманентне GNSS мреже станица Србије. Приказана је методологија анализе и кратко су објашњене резултујуће брзине станица. Тренд крусталне деформације је јасно идентификован, иако је коришћен кратки временски интервал, потврђујући тако могућности мреже перманентних станица за локалне и регионалне геодинамичке студије. Abstract. The paper presents preliminary results of coordinate time series analysis in the Serbian network of permanent GNSS stations. The analysis methodology is outlined and resulting station velocities are briefly commented. Despite the short time span used, the crustal deformation trend was clearly identified, confirming the potential of the network of permanent stations for local and regional geodynamical studies.",
publisher = "International Association of Geodesy, Zuheir Altamimi, Xavier  Collilieux",
journal = "Reference Frames for Applications in Geosciences (Part III: Definition, Establishment, Maintenance and Integration of Regional Reference Frames)",
booktitle = "The First Insight into Station Velocities in Republic of Serbia",
volume = "138",
doi = "10.1007/978-3-642-32998-2_21"
}

Blagojević, D.,& Vasilić, V.. (2013). The First Insight into Station Velocities in Republic of Serbia. in Reference Frames for Applications in Geosciences (Part III: Definition, Establishment, Maintenance and Integration of Regional Reference Frames)
International Association of Geodesy, Zuheir Altamimi, Xavier  Collilieux., 138.
https://doi.org/10.1007/978-3-642-32998-2_21

Blagojević D, Vasilić V. The First Insight into Station Velocities in Republic of Serbia. in Reference Frames for Applications in Geosciences (Part III: Definition, Establishment, Maintenance and Integration of Regional Reference Frames). 2013;138.
doi:10.1007/978-3-642-32998-2_21 .

Blagojević, Dragan, Vasilić, Violeta, "The First Insight into Station Velocities in Republic of Serbia" in Reference Frames for Applications in Geosciences (Part III: Definition, Establishment, Maintenance and Integration of Regional Reference Frames), 138 (2013),
https://doi.org/10.1007/978-3-642-32998-2_21 . .

TY  - CONF
AU  - Blagojević, Dragan
AU  - Vasilić, Violeta
PY  - 2013
UR  - https://grafar.grf.bg.ac.rs/handle/123456789/519
AB  - The paper presents preliminary results of coordinate time series analysis in Serbian network of permanent GNSS stations. Analysis methodology is outlined and resulting station velocities are briefly commented. Despite the short time span used, the crustal deformation trend was clearly identified, confirming the potential of the network of permanent stations for local and regional geodynamical studies.
C3  - Reference Frames for Applications in Geosciences
T1  - The First Insight into Station Velocities in Republic of Serbia
EP  - 136
SP  - 133
VL  - 138
DO  - 10.1007/978-3-642-32998-2_21
ER  - 

@conference{
author = "Blagojević, Dragan and Vasilić, Violeta",
year = "2013",
abstract = "The paper presents preliminary results of coordinate time series analysis in Serbian network of permanent GNSS stations. Analysis methodology is outlined and resulting station velocities are briefly commented. Despite the short time span used, the crustal deformation trend was clearly identified, confirming the potential of the network of permanent stations for local and regional geodynamical studies.",
journal = "Reference Frames for Applications in Geosciences",
title = "The First Insight into Station Velocities in Republic of Serbia",
pages = "136-133",
volume = "138",
doi = "10.1007/978-3-642-32998-2_21"
}

Blagojević, D.,& Vasilić, V.. (2013). The First Insight into Station Velocities in Republic of Serbia. in Reference Frames for Applications in Geosciences, 138, 133-136.
https://doi.org/10.1007/978-3-642-32998-2_21

Blagojević D, Vasilić V. The First Insight into Station Velocities in Republic of Serbia. in Reference Frames for Applications in Geosciences. 2013;138:133-136.
doi:10.1007/978-3-642-32998-2_21 .

Blagojević, Dragan, Vasilić, Violeta, "The First Insight into Station Velocities in Republic of Serbia" in Reference Frames for Applications in Geosciences, 138 (2013):133-136,
https://doi.org/10.1007/978-3-642-32998-2_21 . .

TY  - CONF
AU  - Blagojević, Dragan
AU  - Todorović, Goran
AU  - Vasilić, Violeta
PY  - 2012
UR  - https://meetingorganizer.copernicus.org/EGU2012/poster_programme/9709
UR  - https://grafar.grf.bg.ac.rs/handle/123456789/1932
AB  - Сажетак: Предмет овог рада је истраживање доприноса временских серија GPS координата развоју Међународног Терестричког Референтног Фрејма ITRF. Анализа GPS сетова података би требало да детектује не само могуће трендове већ би такође требало да открије офсете или дисконтинуитете узроковане природним процесима као што су изненадна крустална померања или земљотреси као и оних померања која су нису узрокована природним догађајима, односно људском делатношћу.
Abstract. The subject of this paper is to investigate the contribution of GPS coordinate time series to the development of the International Terrestrial Reference Frame (ITRF). The analysis of the GPS data sets should not only detect possible trends but should also discover offsets or discontinuities caused by natural processes like sudden crustal movements and earthquakes, as well as those caused by artificial events and man-made activities.
This kind of analysis is important because it contributes to the understanding of Reference Frame stability and enables deeper insight into local, regional, and global geodynamical processes. The paper describes the strategy and some results obtained by the analysis of data from Reference GNSS stations located in the Republic of Serbia.
PB  - European Geosciences Union
C3  - European Geosciences Union General Assembly, Geodesy, Reference Frames and Geodetic Observing Systems
T1  - Assessment of Reference Frame Stability trough offset detection in GPS coordinate time series
VL  - Geophysical Research Abstracts, Vol. 14, Poster
UR  - https://hdl.handle.net/21.15107/rcub_grafar_1932
ER  - 

@conference{
author = "Blagojević, Dragan and Todorović, Goran and Vasilić, Violeta",
year = "2012",
abstract = "Сажетак: Предмет овог рада је истраживање доприноса временских серија GPS координата развоју Међународног Терестричког Референтног Фрејма ITRF. Анализа GPS сетова података би требало да детектује не само могуће трендове већ би такође требало да открије офсете или дисконтинуитете узроковане природним процесима као што су изненадна крустална померања или земљотреси као и оних померања која су нису узрокована природним догађајима, односно људском делатношћу.
Abstract. The subject of this paper is to investigate the contribution of GPS coordinate time series to the development of the International Terrestrial Reference Frame (ITRF). The analysis of the GPS data sets should not only detect possible trends but should also discover offsets or discontinuities caused by natural processes like sudden crustal movements and earthquakes, as well as those caused by artificial events and man-made activities.
This kind of analysis is important because it contributes to the understanding of Reference Frame stability and enables deeper insight into local, regional, and global geodynamical processes. The paper describes the strategy and some results obtained by the analysis of data from Reference GNSS stations located in the Republic of Serbia.",
publisher = "European Geosciences Union",
journal = "European Geosciences Union General Assembly, Geodesy, Reference Frames and Geodetic Observing Systems",
title = "Assessment of Reference Frame Stability trough offset detection in GPS coordinate time series",
volume = "Geophysical Research Abstracts, Vol. 14, Poster",
url = "https://hdl.handle.net/21.15107/rcub_grafar_1932"
}

Blagojević, D., Todorović, G.,& Vasilić, V.. (2012). Assessment of Reference Frame Stability trough offset detection in GPS coordinate time series. in European Geosciences Union General Assembly, Geodesy, Reference Frames and Geodetic Observing Systems
European Geosciences Union., Geophysical Research Abstracts, Vol. 14, Poster.
https://hdl.handle.net/21.15107/rcub_grafar_1932

Blagojević D, Todorović G, Vasilić V. Assessment of Reference Frame Stability trough offset detection in GPS coordinate time series. in European Geosciences Union General Assembly, Geodesy, Reference Frames and Geodetic Observing Systems. 2012;Geophysical Research Abstracts, Vol. 14, Poster.
https://hdl.handle.net/21.15107/rcub_grafar_1932 .

Blagojević, Dragan, Todorović, Goran, Vasilić, Violeta, "Assessment of Reference Frame Stability trough offset detection in GPS coordinate time series" in European Geosciences Union General Assembly, Geodesy, Reference Frames and Geodetic Observing Systems, Geophysical Research Abstracts, Vol. 14, Poster (2012),
https://hdl.handle.net/21.15107/rcub_grafar_1932 .

TY  - JOUR
AU  - Gučević, Jelena
AU  - Ogrizović, Vukan
AU  - Delčev, Siniša
AU  - Vasilić, Violeta
PY  - 2010
UR  - https://grafar.grf.bg.ac.rs/handle/123456789/284
AB  - Modelling the effects of topographic masses which bear local changes of the gravity field is exceptionally important in the contemporary scientific and practical implementations. The topography effect in this paper is analysed by the digital terrain model of the Republic of Serbia, developed on the basis of the topographic map at the scale of 1:25 000 and by the hypothesis on the equal density of surface layers of the Earth crust. The shortwave characteristic as an impact of the local topography was analysed in parts with different topography for the region of Belgrade and Pal-clan. The gravity field parameters were determined in points of the reference GPS network of the Republic of Serbia and points of the Paracin basis, with the purpose of comparing gravimetric vertical deflections with astro-geodetic vertical deflections.
T2  - Geodetski list
T1  - Optimum Resolution and Size of DTM during Modelling Topographic Effect
EP  - 192
IS  - 3
SP  - 177
VL  - 64
UR  - https://hdl.handle.net/21.15107/rcub_grafar_284
ER  - 

@article{
author = "Gučević, Jelena and Ogrizović, Vukan and Delčev, Siniša and Vasilić, Violeta",
year = "2010",
abstract = "Modelling the effects of topographic masses which bear local changes of the gravity field is exceptionally important in the contemporary scientific and practical implementations. The topography effect in this paper is analysed by the digital terrain model of the Republic of Serbia, developed on the basis of the topographic map at the scale of 1:25 000 and by the hypothesis on the equal density of surface layers of the Earth crust. The shortwave characteristic as an impact of the local topography was analysed in parts with different topography for the region of Belgrade and Pal-clan. The gravity field parameters were determined in points of the reference GPS network of the Republic of Serbia and points of the Paracin basis, with the purpose of comparing gravimetric vertical deflections with astro-geodetic vertical deflections.",
journal = "Geodetski list",
title = "Optimum Resolution and Size of DTM during Modelling Topographic Effect",
pages = "192-177",
number = "3",
volume = "64",
url = "https://hdl.handle.net/21.15107/rcub_grafar_284"
}

Gučević, J., Ogrizović, V., Delčev, S.,& Vasilić, V.. (2010). Optimum Resolution and Size of DTM during Modelling Topographic Effect. in Geodetski list, 64(3), 177-192.
https://hdl.handle.net/21.15107/rcub_grafar_284

Gučević J, Ogrizović V, Delčev S, Vasilić V. Optimum Resolution and Size of DTM during Modelling Topographic Effect. in Geodetski list. 2010;64(3):177-192.
https://hdl.handle.net/21.15107/rcub_grafar_284 .

Gučević, Jelena, Ogrizović, Vukan, Delčev, Siniša, Vasilić, Violeta, "Optimum Resolution and Size of DTM during Modelling Topographic Effect" in Geodetski list, 64, no. 3 (2010):177-192,
https://hdl.handle.net/21.15107/rcub_grafar_284 .

TY  - CONF
AU  - Delčev, Siniša
AU  - Ogrizović, Vukan
AU  - Vasilić, Violeta
AU  - Gučević, Jelena
PY  - 2009
UR  - https://www.ortra.com/fig/
UR  - https://grafar.grf.bg.ac.rs/handle/123456789/1933
AB  - Сажетак: Мрежа перманентних станица у Републици Србији је успостављена крајем 2005. године када је и почела да се користи за комерцијалне сврхе. Мрежа је примарно развијена као подршка корисницима у премеру, али такође и као подршка за решавање задатака у области инжењерских радова, развијања геодетских мрежа и навигацији. Због тога и у зависности од захтеване тачности, мрежа је тако замишљена да има три корисничка сервиса. За текуће комерцијалне захтеве, углавном за премер, најчешће је коришћен RTK сервис мреже. Из тог разлога тестирали смо тачност RTK сервиса. Такође, утврдили смо да ли је ова подршка сервиса у складу са пројектованом тачношћу. У ту сврху изведена су експериментална мерења на тачкама са већ познатим координатама и извршена је детаљна анализа добијених резултата. Закључак изведеног експеримента је да RTK сервис мреже перманентних станица пружа тачност координата новоуспостављених тачака у границама од 2-3 cm што је и предвиђено генералним дизајном мреже. Abstract. The permanent station network in the Republic of Serbia was established towards the end of 2005. when it started to be used for commercial purposes. The network was primarily developed as a support to users in surveying, but also as a support for solving problems in the field of engineering works, developing geodetic networks and navigation. Consequently and depending on the required accuracy, the network was conceived to have three customer services. For the current commercial purposes, the RTK service of the network has been most commonly used, mainly for surveying. Therefore, we have tested the accuracy of RTK service. Also we have established whether this service has been realised in compliance with the projected accuracy. For that purpose, experimental measuring has been conducted on the points with already known coordinates and a detailed analysis of the obtained results has been carried out. The conclusion of the conducted experiment is that the RTK service of the permanent station network provides accuracy of coordinates of newly established points within the margins of 2-3 cm, which has been foreseen by the general design of the network.
PB  - International Federation of Surveyors
C3  - FIG Working Week - Surveyors Key Role in Accelerated Development
T1  - Accuracy Testing of RTK Service of the Permanent Station Network in the Republic of Serbia
VL  - Proceedings
UR  - https://hdl.handle.net/21.15107/rcub_grafar_1933
ER  - 

@conference{
author = "Delčev, Siniša and Ogrizović, Vukan and Vasilić, Violeta and Gučević, Jelena",
year = "2009",
abstract = "Сажетак: Мрежа перманентних станица у Републици Србији је успостављена крајем 2005. године када је и почела да се користи за комерцијалне сврхе. Мрежа је примарно развијена као подршка корисницима у премеру, али такође и као подршка за решавање задатака у области инжењерских радова, развијања геодетских мрежа и навигацији. Због тога и у зависности од захтеване тачности, мрежа је тако замишљена да има три корисничка сервиса. За текуће комерцијалне захтеве, углавном за премер, најчешће је коришћен RTK сервис мреже. Из тог разлога тестирали смо тачност RTK сервиса. Такође, утврдили смо да ли је ова подршка сервиса у складу са пројектованом тачношћу. У ту сврху изведена су експериментална мерења на тачкама са већ познатим координатама и извршена је детаљна анализа добијених резултата. Закључак изведеног експеримента је да RTK сервис мреже перманентних станица пружа тачност координата новоуспостављених тачака у границама од 2-3 cm што је и предвиђено генералним дизајном мреже. Abstract. The permanent station network in the Republic of Serbia was established towards the end of 2005. when it started to be used for commercial purposes. The network was primarily developed as a support to users in surveying, but also as a support for solving problems in the field of engineering works, developing geodetic networks and navigation. Consequently and depending on the required accuracy, the network was conceived to have three customer services. For the current commercial purposes, the RTK service of the network has been most commonly used, mainly for surveying. Therefore, we have tested the accuracy of RTK service. Also we have established whether this service has been realised in compliance with the projected accuracy. For that purpose, experimental measuring has been conducted on the points with already known coordinates and a detailed analysis of the obtained results has been carried out. The conclusion of the conducted experiment is that the RTK service of the permanent station network provides accuracy of coordinates of newly established points within the margins of 2-3 cm, which has been foreseen by the general design of the network.",
publisher = "International Federation of Surveyors",
journal = "FIG Working Week - Surveyors Key Role in Accelerated Development",
title = "Accuracy Testing of RTK Service of the Permanent Station Network in the Republic of Serbia",
volume = "Proceedings",
url = "https://hdl.handle.net/21.15107/rcub_grafar_1933"
}

Delčev, S., Ogrizović, V., Vasilić, V.,& Gučević, J.. (2009). Accuracy Testing of RTK Service of the Permanent Station Network in the Republic of Serbia. in FIG Working Week - Surveyors Key Role in Accelerated Development
International Federation of Surveyors., Proceedings.
https://hdl.handle.net/21.15107/rcub_grafar_1933

Delčev S, Ogrizović V, Vasilić V, Gučević J. Accuracy Testing of RTK Service of the Permanent Station Network in the Republic of Serbia. in FIG Working Week - Surveyors Key Role in Accelerated Development. 2009;Proceedings.
https://hdl.handle.net/21.15107/rcub_grafar_1933 .

Delčev, Siniša, Ogrizović, Vukan, Vasilić, Violeta, Gučević, Jelena, "Accuracy Testing of RTK Service of the Permanent Station Network in the Republic of Serbia" in FIG Working Week - Surveyors Key Role in Accelerated Development, Proceedings (2009),
https://hdl.handle.net/21.15107/rcub_grafar_1933 .

TY  - CONF
AU  - Ogrizović, Vukan
AU  - Vasilić, Violeta
AU  - Delčev, Siniša
AU  - Gučević, Jelena
PY  - 2009
UR  - https://grafar.grf.bg.ac.rs/handle/123456789/243
AB  - Periodic tests of quartz oscillators incorporated in GPS receivers in Serbia are performed in accredited metrological laboratories by the procedure adopted in metrological laboratory ML160. However, receivers of Serbian permanent stations network (AGROS) are permanently mounted on the top of roofs of local cadastral offices, spread along territory of Serbia. They cannot be taken to a metrological laboratory for calibration because of need for constant work. A method for testing their oscillator stability is presented in this paper.
C3  - 19th IMEKO World Congress 2009
T1  - Testing the stability of gps oscillators within Serbian permanent gps stations network
EP  - 526
SP  - 522
UR  - https://hdl.handle.net/21.15107/rcub_grafar_243
ER  - 

@conference{
author = "Ogrizović, Vukan and Vasilić, Violeta and Delčev, Siniša and Gučević, Jelena",
year = "2009",
abstract = "Periodic tests of quartz oscillators incorporated in GPS receivers in Serbia are performed in accredited metrological laboratories by the procedure adopted in metrological laboratory ML160. However, receivers of Serbian permanent stations network (AGROS) are permanently mounted on the top of roofs of local cadastral offices, spread along territory of Serbia. They cannot be taken to a metrological laboratory for calibration because of need for constant work. A method for testing their oscillator stability is presented in this paper.",
journal = "19th IMEKO World Congress 2009",
title = "Testing the stability of gps oscillators within Serbian permanent gps stations network",
pages = "526-522",
url = "https://hdl.handle.net/21.15107/rcub_grafar_243"
}

Ogrizović, V., Vasilić, V., Delčev, S.,& Gučević, J.. (2009). Testing the stability of gps oscillators within Serbian permanent gps stations network. in 19th IMEKO World Congress 2009, 522-526.
https://hdl.handle.net/21.15107/rcub_grafar_243

Ogrizović V, Vasilić V, Delčev S, Gučević J. Testing the stability of gps oscillators within Serbian permanent gps stations network. in 19th IMEKO World Congress 2009. 2009;:522-526.
https://hdl.handle.net/21.15107/rcub_grafar_243 .

Ogrizović, Vukan, Vasilić, Violeta, Delčev, Siniša, Gučević, Jelena, "Testing the stability of gps oscillators within Serbian permanent gps stations network" in 19th IMEKO World Congress 2009 (2009):522-526,
https://hdl.handle.net/21.15107/rcub_grafar_243 .

TY  - CONF
AU  - Ogrizović, Vukan
AU  - Delčev, Siniša
AU  - Vasilić, Violeta
AU  - Gučević, Jelena
PY  - 2008
UR  - https://grafar.grf.bg.ac.rs/handle/123456789/203
AB  - Astro-geodetic determinations of vertical deflections in Serbia began during the first years of 20th century. The first field works were led by S. Boskovic. After the 2nd World War, Military Geographic Institute, Department of Geodesy from the Faculty of Civil Engineering, and Federal Geodetic Directorate continued the determinations, needed for reductions of terrestrial geodetic measurements and the astro-geodetic geoid determination. Last years improvements of the astro-geodetic methods are carried out in the area of implementing modern measurement equipment and technologies.
C3  - Proceedings of the Meeting Studying Nature Through Centuries - 120th Anniversary of Belgrade Observa
T1  - Historical review of astro-geodetic observations in Serbia
IS  - 85
SP  - 181
UR  - https://hdl.handle.net/21.15107/rcub_grafar_203
ER  - 

@conference{
author = "Ogrizović, Vukan and Delčev, Siniša and Vasilić, Violeta and Gučević, Jelena",
year = "2008",
abstract = "Astro-geodetic determinations of vertical deflections in Serbia began during the first years of 20th century. The first field works were led by S. Boskovic. After the 2nd World War, Military Geographic Institute, Department of Geodesy from the Faculty of Civil Engineering, and Federal Geodetic Directorate continued the determinations, needed for reductions of terrestrial geodetic measurements and the astro-geodetic geoid determination. Last years improvements of the astro-geodetic methods are carried out in the area of implementing modern measurement equipment and technologies.",
journal = "Proceedings of the Meeting Studying Nature Through Centuries - 120th Anniversary of Belgrade Observa",
title = "Historical review of astro-geodetic observations in Serbia",
number = "85",
pages = "181",
url = "https://hdl.handle.net/21.15107/rcub_grafar_203"
}

Ogrizović, V., Delčev, S., Vasilić, V.,& Gučević, J.. (2008). Historical review of astro-geodetic observations in Serbia. in Proceedings of the Meeting Studying Nature Through Centuries - 120th Anniversary of Belgrade Observa(85), 181.
https://hdl.handle.net/21.15107/rcub_grafar_203

Ogrizović V, Delčev S, Vasilić V, Gučević J. Historical review of astro-geodetic observations in Serbia. in Proceedings of the Meeting Studying Nature Through Centuries - 120th Anniversary of Belgrade Observa. 2008;(85):181.
https://hdl.handle.net/21.15107/rcub_grafar_203 .

Ogrizović, Vukan, Delčev, Siniša, Vasilić, Violeta, Gučević, Jelena, "Historical review of astro-geodetic observations in Serbia" in Proceedings of the Meeting Studying Nature Through Centuries - 120th Anniversary of Belgrade Observa, no. 85 (2008):181,
https://hdl.handle.net/21.15107/rcub_grafar_203 .

TY  - CONF
AU  - Ogrizović, Vukan
AU  - Vasilić, Violeta
AU  - Delčev, Siniša
AU  - Gučević, Jelena
PY  - 2008
UR  - https://www.imeko.org/index.php/tc11-homepage/tc11-documents
UR  - https://grafar.grf.bg.ac.rs/handle/123456789/1935
AB  - Сажетак: У раду је приказана следивост мерења Глобалним GPS позиционим системом до националног стандарда UTC(ZMDM) Србије. Изведен је експеримент репродукције секундарног стандарда ML160 на радне стандарде упоређењем 1PPS (pulse-per-second) сигнала и дата је препорука успостављања мерне следивости у Републици Србији.
Abstract. A traceability chain of Global positioning system (GPS) measurements to Serbian national standard UTC(ZMDM) is presented in the paper. An experiment on reproducing the secondary standard ML160 to working standards by comparing one pulse-per-second (1PPS) signals is performed and a recommendation on establishing measurement traceability in the Republic of Serbia is given.
PB  - International Measurement Confederation
C3  - 20th International Metrology Symposium and 1st Regional Metrology Organisations Symposium - RMO 2008
T1  - National tracebility of GPS measurements in the Republic of Serbia
VL  - Proceedings
UR  - https://hdl.handle.net/21.15107/rcub_grafar_1935
ER  - 

@conference{
author = "Ogrizović, Vukan and Vasilić, Violeta and Delčev, Siniša and Gučević, Jelena",
year = "2008",
abstract = "Сажетак: У раду је приказана следивост мерења Глобалним GPS позиционим системом до националног стандарда UTC(ZMDM) Србије. Изведен је експеримент репродукције секундарног стандарда ML160 на радне стандарде упоређењем 1PPS (pulse-per-second) сигнала и дата је препорука успостављања мерне следивости у Републици Србији.
Abstract. A traceability chain of Global positioning system (GPS) measurements to Serbian national standard UTC(ZMDM) is presented in the paper. An experiment on reproducing the secondary standard ML160 to working standards by comparing one pulse-per-second (1PPS) signals is performed and a recommendation on establishing measurement traceability in the Republic of Serbia is given.",
publisher = "International Measurement Confederation",
journal = "20th International Metrology Symposium and 1st Regional Metrology Organisations Symposium - RMO 2008",
title = "National tracebility of GPS measurements in the Republic of Serbia",
volume = "Proceedings",
url = "https://hdl.handle.net/21.15107/rcub_grafar_1935"
}

Ogrizović, V., Vasilić, V., Delčev, S.,& Gučević, J.. (2008). National tracebility of GPS measurements in the Republic of Serbia. in 20th International Metrology Symposium and 1st Regional Metrology Organisations Symposium - RMO 2008
International Measurement Confederation., Proceedings.
https://hdl.handle.net/21.15107/rcub_grafar_1935

Ogrizović V, Vasilić V, Delčev S, Gučević J. National tracebility of GPS measurements in the Republic of Serbia. in 20th International Metrology Symposium and 1st Regional Metrology Organisations Symposium - RMO 2008. 2008;Proceedings.
https://hdl.handle.net/21.15107/rcub_grafar_1935 .

Ogrizović, Vukan, Vasilić, Violeta, Delčev, Siniša, Gučević, Jelena, "National tracebility of GPS measurements in the Republic of Serbia" in 20th International Metrology Symposium and 1st Regional Metrology Organisations Symposium - RMO 2008, Proceedings (2008),
https://hdl.handle.net/21.15107/rcub_grafar_1935 .

TY  - CONF
AU  - Ogrizović, Vukan
AU  - Vasilić, Violeta
AU  - Delčev, Siniša
AU  - Gučević, Jelena
PY  - 2008
UR  - https://grafar.grf.bg.ac.rs/handle/123456789/191
AB  - A traceability chain of Global positioning system (GPS) measurements to Serbian national standard UTC(ZMDM) is presented in the paper. An experiment on reproducing the secondary standard ML160 to working standards by comparing one pulse-per-second (1PPS) signals is performed and a recommendation on establishing a measurement traceability in the Republic of Serbia are given.
C3  - 20th International Metrology Symposium and 1st Regional Metrology Organisations Symposium 2008, RMO
T1  - National traceability of GPS measurements in the Republic of Serbia
EP  - 183
SP  - 180
UR  - https://hdl.handle.net/21.15107/rcub_grafar_191
ER  - 

@conference{
author = "Ogrizović, Vukan and Vasilić, Violeta and Delčev, Siniša and Gučević, Jelena",
year = "2008",
abstract = "A traceability chain of Global positioning system (GPS) measurements to Serbian national standard UTC(ZMDM) is presented in the paper. An experiment on reproducing the secondary standard ML160 to working standards by comparing one pulse-per-second (1PPS) signals is performed and a recommendation on establishing a measurement traceability in the Republic of Serbia are given.",
journal = "20th International Metrology Symposium and 1st Regional Metrology Organisations Symposium 2008, RMO",
title = "National traceability of GPS measurements in the Republic of Serbia",
pages = "183-180",
url = "https://hdl.handle.net/21.15107/rcub_grafar_191"
}

Ogrizović, V., Vasilić, V., Delčev, S.,& Gučević, J.. (2008). National traceability of GPS measurements in the Republic of Serbia. in 20th International Metrology Symposium and 1st Regional Metrology Organisations Symposium 2008, RMO, 180-183.
https://hdl.handle.net/21.15107/rcub_grafar_191

Ogrizović V, Vasilić V, Delčev S, Gučević J. National traceability of GPS measurements in the Republic of Serbia. in 20th International Metrology Symposium and 1st Regional Metrology Organisations Symposium 2008, RMO. 2008;:180-183.
https://hdl.handle.net/21.15107/rcub_grafar_191 .

Ogrizović, Vukan, Vasilić, Violeta, Delčev, Siniša, Gučević, Jelena, "National traceability of GPS measurements in the Republic of Serbia" in 20th International Metrology Symposium and 1st Regional Metrology Organisations Symposium 2008, RMO (2008):180-183,
https://hdl.handle.net/21.15107/rcub_grafar_191 .