TY  - JOUR
AU  - Odalović, Oleg
AU  - Petković, Dušan
AU  - Grekulović, Sanja
AU  - Todorović Drakul, Miljana
PY  - 2024
UR  - https://ojs.gi.sanu.ac.rs/index.php/zbornik/article/view/782
UR  - https://grafar.grf.bg.ac.rs/handle/123456789/3502
AB  - Since the early 21st century, Global Positioning System (GPS) technology has dominated geodetic reference networks. Almost all countries established a permanent Global Navigation Satellite System (GNSS) station network to augment all available GNSS systems. By the end of 2005, Serbia completed the Active Geodetic Reference Network as a particular project of Serbia's Republic Geodetic Authority (RGA). Besides RGA, two private companies, Vekom and Geotaur, have established permanent station networks. This paper assesses the compliance of all the three networks, and network results are evaluated against the spatial distance determined by classical geodetic methods. When all available GNSS constellations are utilized, NAVSTAR, GLONASS, BEIDOU, and GALILEO, in the processing procedure, the established networks in Serbia align within a margin of about 3 mm across all coordinate axes. The results obtained within the research indicate that by using GNSS networks, it is possible to provide the coordinates of the points for the establishment of the national spatial reference system of Serbia, the reference system in almost all engineering fields, reference systems for the maintenance works of the real estate cadastre, and it is also possible to provide coordinates of points that can be used to define local, national, and world reference heights surfaces.
PB  - Geographical Institute “Jovan Cvijić” of the Serbian Academy of Sciences and Arts (SASA), 9 Djure Jakšića St., Belgrade 11000, Serbia
T2  - Journal of the Geographical Institute “Jovan Cvijić” SASA
T1  - A compliance assessment of GNSS station networks in Serbia
EP  - 61
IS  - 1
SP  - 47
VL  - 74
DO  - 10.2298/IJGI2401047O
ER  - 

@article{
author = "Odalović, Oleg and Petković, Dušan and Grekulović, Sanja and Todorović Drakul, Miljana",
year = "2024",
abstract = "Since the early 21st century, Global Positioning System (GPS) technology has dominated geodetic reference networks. Almost all countries established a permanent Global Navigation Satellite System (GNSS) station network to augment all available GNSS systems. By the end of 2005, Serbia completed the Active Geodetic Reference Network as a particular project of Serbia's Republic Geodetic Authority (RGA). Besides RGA, two private companies, Vekom and Geotaur, have established permanent station networks. This paper assesses the compliance of all the three networks, and network results are evaluated against the spatial distance determined by classical geodetic methods. When all available GNSS constellations are utilized, NAVSTAR, GLONASS, BEIDOU, and GALILEO, in the processing procedure, the established networks in Serbia align within a margin of about 3 mm across all coordinate axes. The results obtained within the research indicate that by using GNSS networks, it is possible to provide the coordinates of the points for the establishment of the national spatial reference system of Serbia, the reference system in almost all engineering fields, reference systems for the maintenance works of the real estate cadastre, and it is also possible to provide coordinates of points that can be used to define local, national, and world reference heights surfaces.",
publisher = "Geographical Institute “Jovan Cvijić” of the Serbian Academy of Sciences and Arts (SASA), 9 Djure Jakšića St., Belgrade 11000, Serbia",
journal = "Journal of the Geographical Institute “Jovan Cvijić” SASA",
title = "A compliance assessment of GNSS station networks in Serbia",
pages = "61-47",
number = "1",
volume = "74",
doi = "10.2298/IJGI2401047O"
}

Odalović, O., Petković, D., Grekulović, S.,& Todorović Drakul, M.. (2024). A compliance assessment of GNSS station networks in Serbia. in Journal of the Geographical Institute “Jovan Cvijić” SASA
Geographical Institute “Jovan Cvijić” of the Serbian Academy of Sciences and Arts (SASA), 9 Djure Jakšića St., Belgrade 11000, Serbia., 74(1), 47-61.
https://doi.org/10.2298/IJGI2401047O

Odalović O, Petković D, Grekulović S, Todorović Drakul M. A compliance assessment of GNSS station networks in Serbia. in Journal of the Geographical Institute “Jovan Cvijić” SASA. 2024;74(1):47-61.
doi:10.2298/IJGI2401047O .

Odalović, Oleg, Petković, Dušan, Grekulović, Sanja, Todorović Drakul, Miljana, "A compliance assessment of GNSS station networks in Serbia" in Journal of the Geographical Institute “Jovan Cvijić” SASA, 74, no. 1 (2024):47-61,
https://doi.org/10.2298/IJGI2401047O . .

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  - CONF
AU  - Petković, Dušan
AU  - Grekulović, Sanja
AU  - Todorović Drakul, Miljana
AU  - Odalović, Oleg
PY  - 2023
UR  - https://geoscira.wixsite.com/2023
UR  - https://grafar.grf.bg.ac.rs/handle/123456789/3240
AB  - Since the last few decades of the 20th and the beginning of civilian application of NAVigation Satellite Timing And Ranging Global Positioning System (NAVSTAR GPS) established by the United States Department of Defense, satellite positioning is the most widespread technology for position determination on any place in the Earth's surface (Hofmann-Wellenhof et al., 2008). Besides positioning, a Global Navigation Satellite Systems (GNSS; a common name for all operational navigation systems worldwide) technology is used for other research applications such as atmospheric parameter estimation, i.e., ionospheric determination (Seeber et al., 2003). This paper presents the possibility of the GNSS technology as a tool for determining ionospheric models by the Bernese GNSS Software (Dach et al., 2015). Bernese supports three types of models to represent the ionosphere: local models based on Taylor series expansions, and station-specific and global (or regional) models based on spherical harmonic expansions (Schaer, 1999). Mentioned Ionospheric models (also called Ionospheric maps) can be produced in Bernese ION format or as a common data-exchange IONosphere EXchange (IONEX) format (Schaer et al., 1998). Based on these formats, it is possible to determine the quantity that characterizes the current state of the ionosphere, the so-called Total Electron Content (TEC).
PB  - Faculty of Civil Engineering, University of Belgrade
PB  - Institute of Physics Belgrade, University of Belgrade
C3  - International Conference on Recent Trends in Geoscience Research and Applications, Belgrade, October 23–27, 2023
T1  - Determination of ionospheric models using global navigational satellite systems and Bernese GNSS software
SP  - 90
UR  - https://hdl.handle.net/21.15107/rcub_grafar_3240
ER  - 

@conference{
author = "Petković, Dušan and Grekulović, Sanja and Todorović Drakul, Miljana and Odalović, Oleg",
year = "2023",
abstract = "Since the last few decades of the 20th and the beginning of civilian application of NAVigation Satellite Timing And Ranging Global Positioning System (NAVSTAR GPS) established by the United States Department of Defense, satellite positioning is the most widespread technology for position determination on any place in the Earth's surface (Hofmann-Wellenhof et al., 2008). Besides positioning, a Global Navigation Satellite Systems (GNSS; a common name for all operational navigation systems worldwide) technology is used for other research applications such as atmospheric parameter estimation, i.e., ionospheric determination (Seeber et al., 2003). This paper presents the possibility of the GNSS technology as a tool for determining ionospheric models by the Bernese GNSS Software (Dach et al., 2015). Bernese supports three types of models to represent the ionosphere: local models based on Taylor series expansions, and station-specific and global (or regional) models based on spherical harmonic expansions (Schaer, 1999). Mentioned Ionospheric models (also called Ionospheric maps) can be produced in Bernese ION format or as a common data-exchange IONosphere EXchange (IONEX) format (Schaer et al., 1998). Based on these formats, it is possible to determine the quantity that characterizes the current state of the ionosphere, the so-called Total Electron Content (TEC).",
publisher = "Faculty of Civil Engineering, University of Belgrade, Institute of Physics Belgrade, University of Belgrade",
journal = "International Conference on Recent Trends in Geoscience Research and Applications, Belgrade, October 23–27, 2023",
title = "Determination of ionospheric models using global navigational satellite systems and Bernese GNSS software",
pages = "90",
url = "https://hdl.handle.net/21.15107/rcub_grafar_3240"
}

Petković, D., Grekulović, S., Todorović Drakul, M.,& Odalović, O.. (2023). Determination of ionospheric models using global navigational satellite systems and Bernese GNSS software. in International Conference on Recent Trends in Geoscience Research and Applications, Belgrade, October 23–27, 2023
Faculty of Civil Engineering, University of Belgrade., 90.
https://hdl.handle.net/21.15107/rcub_grafar_3240

Petković D, Grekulović S, Todorović Drakul M, Odalović O. Determination of ionospheric models using global navigational satellite systems and Bernese GNSS software. in International Conference on Recent Trends in Geoscience Research and Applications, Belgrade, October 23–27, 2023. 2023;:90.
https://hdl.handle.net/21.15107/rcub_grafar_3240 .

Petković, Dušan, Grekulović, Sanja, Todorović Drakul, Miljana, Odalović, Oleg, "Determination of ionospheric models using global navigational satellite systems and Bernese GNSS software" in International Conference on Recent Trends in Geoscience Research and Applications, Belgrade, October 23–27, 2023 (2023):90,
https://hdl.handle.net/21.15107/rcub_grafar_3240 .

TY  - CONF
AU  - Odalović, Oleg
AU  - Petković, Dušan
AU  - Grekulović, Sanja
AU  - Todorović-Drakul, Miljana
PY  - 2022
UR  - http://www.drustvometrologa.org/radovi2022.php
UR  - https://grafar.grf.bg.ac.rs/handle/123456789/3044
AB  - Постоје четири у потпуности успостављена Глобална навигациона сателитска система (ГНСС): амерички GPS NAVSTAR, руски GLONASS, кинески BEIDOU (COMPASS) и европски GALILEO. Њиховом применом успешно се успостављају терестрички референтни системи широм планете. У овом раду приказан је поступак успостављања теренске базе за еталонирање мерила дужине применом технологије ГНСС-а. На релативно кратком растојању дефинисане су крајње тачке теренске базе чије су координате одређене на основу ГНСС опажања. Одређена је мерна несигурност дефинисане базе и извршено је поређење добијених резултата са вредностима добијеним класичним геодетским методама.
AB  - There are four fully operational Global Navigation Satellite Systems (GNSS): United States GPS NAVSTAR, Russian GLONASS, Chine’s BEIDOU (COMPASS), and European GALILEO. With their application, reference systems around the planet were established. This paper presents a procedure for establishing a field base for calibrating length measurement equipment using GNSS. A field base is defined as a short distance determined by its endpoints using GNSS technology. The measurement uncertainty was calculated for the defined base, and the results were compared with the values obtained using traditional geodetic methods.
PB  - Друштво метролога
C3  - Конгрес метролога 2022
T1  - Одређивање мерне несигурности резултата мерења просторног растојања применом глобалних навигационих сателитских система
T1  - Determination of spatial distance measurement uncertainty using global navigation satellite systems
UR  - https://hdl.handle.net/21.15107/rcub_grafar_3044
ER  - 

@conference{
author = "Odalović, Oleg and Petković, Dušan and Grekulović, Sanja and Todorović-Drakul, Miljana",
year = "2022",
abstract = "Постоје четири у потпуности успостављена Глобална навигациона сателитска система (ГНСС): амерички GPS NAVSTAR, руски GLONASS, кинески BEIDOU (COMPASS) и европски GALILEO. Њиховом применом успешно се успостављају терестрички референтни системи широм планете. У овом раду приказан је поступак успостављања теренске базе за еталонирање мерила дужине применом технологије ГНСС-а. На релативно кратком растојању дефинисане су крајње тачке теренске базе чије су координате одређене на основу ГНСС опажања. Одређена је мерна несигурност дефинисане базе и извршено је поређење добијених резултата са вредностима добијеним класичним геодетским методама., There are four fully operational Global Navigation Satellite Systems (GNSS): United States GPS NAVSTAR, Russian GLONASS, Chine’s BEIDOU (COMPASS), and European GALILEO. With their application, reference systems around the planet were established. This paper presents a procedure for establishing a field base for calibrating length measurement equipment using GNSS. A field base is defined as a short distance determined by its endpoints using GNSS technology. The measurement uncertainty was calculated for the defined base, and the results were compared with the values obtained using traditional geodetic methods.",
publisher = "Друштво метролога",
journal = "Конгрес метролога 2022",
title = "Одређивање мерне несигурности резултата мерења просторног растојања применом глобалних навигационих сателитских система, Determination of spatial distance measurement uncertainty using global navigation satellite systems",
url = "https://hdl.handle.net/21.15107/rcub_grafar_3044"
}

Odalović, O., Petković, D., Grekulović, S.,& Todorović-Drakul, M.. (2022). Одређивање мерне несигурности резултата мерења просторног растојања применом глобалних навигационих сателитских система. in Конгрес метролога 2022
Друштво метролога..
https://hdl.handle.net/21.15107/rcub_grafar_3044

Odalović O, Petković D, Grekulović S, Todorović-Drakul M. Одређивање мерне несигурности резултата мерења просторног растојања применом глобалних навигационих сателитских система. in Конгрес метролога 2022. 2022;.
https://hdl.handle.net/21.15107/rcub_grafar_3044 .

Odalović, Oleg, Petković, Dušan, Grekulović, Sanja, Todorović-Drakul, Miljana, "Одређивање мерне несигурности резултата мерења просторног растојања применом глобалних навигационих сателитских система" in Конгрес метролога 2022 (2022),
https://hdl.handle.net/21.15107/rcub_grafar_3044 .

TY  - CONF
AU  - Odalović, Oleg
AU  - Grekulović, Sanja
AU  - Todorović Drakul, Miljana
AU  - Petković, Dušan
PY  - 2022
UR  - https://epslibrary.at/sgem_jresearch_publication_view.php?page=view&editid1=8490&
UR  - https://grafar.grf.bg.ac.rs/handle/123456789/3036
AB  - The new network of permanent GNSS (Global Navigation Satellite System) stations should be established by the end of this year. At the moment, 18 permanent stations are already established. All stations coordinates must be determined following the conditions dictated by the Republic Geodetic Authority of Serbia, i.e., the Rule Book for establishing the GNSS permanent stations network. The coordinates of stations, the final solution, must be calculated from three consecutive uninterrupted daily sessions as a combined solution of all three days. The essential condition that must be fulfilled is the daily repeatability of the coordinates of the points for the three daily solutions on the level of 10 mm in the horizontal direction and 15 mm in the vertical direction. In other words, GNSS coordinates of the permanent station can be treated as calculated and adopted as final if the differences between coordinates of the daily solution and final solution do not exceed 10 mm in the horizontal direction and 15 mm in the vertical direction. In this research, preliminary calculations of coordinates repeatability are checked using Bernese GNSS Software Version 5.2 and two online RINEX processing tools, Australian AUSPOS - Online GPS Processing Service and Canadian CSRS-PPP (Canadian Spatial Reference System Precise Point Positioning).
PB  - SGEM, 51 Alexander Malinov blvd, Sofia, 1712, Bulgaria
C3  - 22nd International Multidisciplinary Scientific GeoConference SGEM 2022, Vol22, Issue 2.1
T1  - Determinations of the preliminary coordinates for the new GNSS permanent station network in Serbia
EP  - 194
IS  - 2.1
SP  - 187
VL  - 22
DO  - 10.5593/sgem2022/2.1/s09.23
ER  - 

@conference{
author = "Odalović, Oleg and Grekulović, Sanja and Todorović Drakul, Miljana and Petković, Dušan",
year = "2022",
abstract = "The new network of permanent GNSS (Global Navigation Satellite System) stations should be established by the end of this year. At the moment, 18 permanent stations are already established. All stations coordinates must be determined following the conditions dictated by the Republic Geodetic Authority of Serbia, i.e., the Rule Book for establishing the GNSS permanent stations network. The coordinates of stations, the final solution, must be calculated from three consecutive uninterrupted daily sessions as a combined solution of all three days. The essential condition that must be fulfilled is the daily repeatability of the coordinates of the points for the three daily solutions on the level of 10 mm in the horizontal direction and 15 mm in the vertical direction. In other words, GNSS coordinates of the permanent station can be treated as calculated and adopted as final if the differences between coordinates of the daily solution and final solution do not exceed 10 mm in the horizontal direction and 15 mm in the vertical direction. In this research, preliminary calculations of coordinates repeatability are checked using Bernese GNSS Software Version 5.2 and two online RINEX processing tools, Australian AUSPOS - Online GPS Processing Service and Canadian CSRS-PPP (Canadian Spatial Reference System Precise Point Positioning).",
publisher = "SGEM, 51 Alexander Malinov blvd, Sofia, 1712, Bulgaria",
journal = "22nd International Multidisciplinary Scientific GeoConference SGEM 2022, Vol22, Issue 2.1",
title = "Determinations of the preliminary coordinates for the new GNSS permanent station network in Serbia",
pages = "194-187",
number = "2.1",
volume = "22",
doi = "10.5593/sgem2022/2.1/s09.23"
}

Odalović, O., Grekulović, S., Todorović Drakul, M.,& Petković, D.. (2022). Determinations of the preliminary coordinates for the new GNSS permanent station network in Serbia. in 22nd International Multidisciplinary Scientific GeoConference SGEM 2022, Vol22, Issue 2.1
SGEM, 51 Alexander Malinov blvd, Sofia, 1712, Bulgaria., 22(2.1), 187-194.
https://doi.org/10.5593/sgem2022/2.1/s09.23

Odalović O, Grekulović S, Todorović Drakul M, Petković D. Determinations of the preliminary coordinates for the new GNSS permanent station network in Serbia. in 22nd International Multidisciplinary Scientific GeoConference SGEM 2022, Vol22, Issue 2.1. 2022;22(2.1):187-194.
doi:10.5593/sgem2022/2.1/s09.23 .

Odalović, Oleg, Grekulović, Sanja, Todorović Drakul, Miljana, Petković, Dušan, "Determinations of the preliminary coordinates for the new GNSS permanent station network in Serbia" in 22nd International Multidisciplinary Scientific GeoConference SGEM 2022, Vol22, Issue 2.1, 22, no. 2.1 (2022):187-194,
https://doi.org/10.5593/sgem2022/2.1/s09.23 . .

TY  - JOUR
AU  - Petković, Dušan
AU  - Odalović, Oleg
AU  - Nina, Aleksandra
PY  - 2022
UR  - https://www.astro.sk/caosp/Eedition/Abstracts/2022/Vol_52/No_3/index.html
UR  - https://www.astro.sk/caosp/Eedition/Abstracts/2022/Vol_52/No_3/pp116-125_abstract.html
UR  - https://grafar.grf.bg.ac.rs/handle/123456789/2802
AB  - Recent research indicates that the influence of the ionospheric D-region on the propagation of satellite signals cannot be ignored during the intense X-radiation emitted during solar X-ray flares. In this paper, we investigate the influence of changes in the solar hydrogen Lya radiation, which is manifested in variations of the D-region electron density and, consequently, the total electron content in this region, on the propagation of the Global Navigation Satellite System (GNSS) signals. We consider changes during a solar cycle and year, represented by the smoothed daily sunspot number and the day of year. The obtained results indicate that the influence of the D-region on these signals is not negligible for positioning with a single signal recorded by a single receiver during the period around the maximum of a solar cycle.
PB  - Astronomical Institute of the Slovak Academy of Sciences
T2  - Contributions of the Astronomical Observatory Skalnate Pleso
T1  - Influence of the solar hydrogen Lya line on the GNSS signal delay in the ionospheric D-region
EP  - 125
IS  - 3
SP  - 116
VL  - 52
DO  - 10.31577/caosp.2022.52.3.116
ER  - 

@article{
author = "Petković, Dušan and Odalović, Oleg and Nina, Aleksandra",
year = "2022",
abstract = "Recent research indicates that the influence of the ionospheric D-region on the propagation of satellite signals cannot be ignored during the intense X-radiation emitted during solar X-ray flares. In this paper, we investigate the influence of changes in the solar hydrogen Lya radiation, which is manifested in variations of the D-region electron density and, consequently, the total electron content in this region, on the propagation of the Global Navigation Satellite System (GNSS) signals. We consider changes during a solar cycle and year, represented by the smoothed daily sunspot number and the day of year. The obtained results indicate that the influence of the D-region on these signals is not negligible for positioning with a single signal recorded by a single receiver during the period around the maximum of a solar cycle.",
publisher = "Astronomical Institute of the Slovak Academy of Sciences",
journal = "Contributions of the Astronomical Observatory Skalnate Pleso",
title = "Influence of the solar hydrogen Lya line on the GNSS signal delay in the ionospheric D-region",
pages = "125-116",
number = "3",
volume = "52",
doi = "10.31577/caosp.2022.52.3.116"
}

Petković, D., Odalović, O.,& Nina, A.. (2022). Influence of the solar hydrogen Lya line on the GNSS signal delay in the ionospheric D-region. in Contributions of the Astronomical Observatory Skalnate Pleso
Astronomical Institute of the Slovak Academy of Sciences., 52(3), 116-125.
https://doi.org/10.31577/caosp.2022.52.3.116

Petković D, Odalović O, Nina A. Influence of the solar hydrogen Lya line on the GNSS signal delay in the ionospheric D-region. in Contributions of the Astronomical Observatory Skalnate Pleso. 2022;52(3):116-125.
doi:10.31577/caosp.2022.52.3.116 .

Petković, Dušan, Odalović, Oleg, Nina, Aleksandra, "Influence of the solar hydrogen Lya line on the GNSS signal delay in the ionospheric D-region" in Contributions of the Astronomical Observatory Skalnate Pleso, 52, no. 3 (2022):116-125,
https://doi.org/10.31577/caosp.2022.52.3.116 . .

TY  - CONF
AU  - Todorović-Drakul, Miljana
AU  - Grekulović, Sanja
AU  - Odalovic, Oleg
AU  - Petković, Dušan
PY  - 2022
UR  - https://grafar.grf.bg.ac.rs/handle/123456789/2689
AB  - In this paper, a comparative study of the total vertical electron content (VTEC) calculated using the IRI-2016 and NeQuick2 models were performed. The research was done for the days of maximum solar activity in 2019, with data from seven IGS GNNS stations in the region of the Balkan Peninsula. The results show that both models agree quite well with the observed VTEC values obtained from GNSS measurements at all stations, although with some offset observed during several days at different times. The IRI-2016 model performed better than the NeQuick2 model most of the days and stations for which the NeQuick model overestimates the GNSS VTEC. The results show that the Neckick model gives better quality values in some cases, but for isolated instances.
AB  - У овом раду вршена је упоредна студија вредности укупног вертикалног садржаја електрона (VTEC) срачунатог коришћењем IRI-2016 и NeQuick2 модела. Истраживање је рађено за дане максималне соларне активности током 2019. године са подацима са седам ИГС ГННС станица у региону Балканског полуострва. Резултати показују да се оба модела прилично добро слажу са вредностима VTEC добијеним из ГНСС мерења на свим станицама, иако са извесним неслагањима уоченим током неколико дана у различитим временским интервалима. Модел IRI-2016 је показао боље перфрормансе од NeQuick2 модела за већину тестираних периода и већину станица за које NeQuick2 прецењује ГНСС VTEC vrednosti. Резултати показују да NeQuick2 модел даје вредности бољег квалитета, али само у ограниченом броју случајева.
PB  - University of Banja Luka, Faculty of Architecture, Civil Engineering and Geodesy
C3  - INTERNATIONAL CONFERENCE ON CONTEMPORARY THEORY AND PRACTICE IN CONSTRUCTION XV
T1  - Comparison of IRI-2016 and NEQUICK models of the ionosphere over the
Balkan Peninsula during the year 2019
T1  - Поређење IRI-2016 и NEQUICK модела јонофере изнад Балканског полуострва током 2019. године
EP  - 293
SP  - 283
DO  - 10.7251/STP2215283T
ER  - 

@conference{
author = "Todorović-Drakul, Miljana and Grekulović, Sanja and Odalovic, Oleg and Petković, Dušan",
year = "2022",
abstract = "In this paper, a comparative study of the total vertical electron content (VTEC) calculated using the IRI-2016 and NeQuick2 models were performed. The research was done for the days of maximum solar activity in 2019, with data from seven IGS GNNS stations in the region of the Balkan Peninsula. The results show that both models agree quite well with the observed VTEC values obtained from GNSS measurements at all stations, although with some offset observed during several days at different times. The IRI-2016 model performed better than the NeQuick2 model most of the days and stations for which the NeQuick model overestimates the GNSS VTEC. The results show that the Neckick model gives better quality values in some cases, but for isolated instances., У овом раду вршена је упоредна студија вредности укупног вертикалног садржаја електрона (VTEC) срачунатог коришћењем IRI-2016 и NeQuick2 модела. Истраживање је рађено за дане максималне соларне активности током 2019. године са подацима са седам ИГС ГННС станица у региону Балканског полуострва. Резултати показују да се оба модела прилично добро слажу са вредностима VTEC добијеним из ГНСС мерења на свим станицама, иако са извесним неслагањима уоченим током неколико дана у различитим временским интервалима. Модел IRI-2016 је показао боље перфрормансе од NeQuick2 модела за већину тестираних периода и већину станица за које NeQuick2 прецењује ГНСС VTEC vrednosti. Резултати показују да NeQuick2 модел даје вредности бољег квалитета, али само у ограниченом броју случајева.",
publisher = "University of Banja Luka, Faculty of Architecture, Civil Engineering and Geodesy",
journal = "INTERNATIONAL CONFERENCE ON CONTEMPORARY THEORY AND PRACTICE IN CONSTRUCTION XV",
title = "Comparison of IRI-2016 and NEQUICK models of the ionosphere over the
Balkan Peninsula during the year 2019, Поређење IRI-2016 и NEQUICK модела јонофере изнад Балканског полуострва током 2019. године",
pages = "293-283",
doi = "10.7251/STP2215283T"
}

Todorović-Drakul, M., Grekulović, S., Odalovic, O.,& Petković, D.. (2022). Comparison of IRI-2016 and NEQUICK models of the ionosphere over the
Balkan Peninsula during the year 2019. in INTERNATIONAL CONFERENCE ON CONTEMPORARY THEORY AND PRACTICE IN CONSTRUCTION XV
University of Banja Luka, Faculty of Architecture, Civil Engineering and Geodesy., 283-293.
https://doi.org/10.7251/STP2215283T

Todorović-Drakul M, Grekulović S, Odalovic O, Petković D. Comparison of IRI-2016 and NEQUICK models of the ionosphere over the
Balkan Peninsula during the year 2019. in INTERNATIONAL CONFERENCE ON CONTEMPORARY THEORY AND PRACTICE IN CONSTRUCTION XV. 2022;:283-293.
doi:10.7251/STP2215283T .

Todorović-Drakul, Miljana, Grekulović, Sanja, Odalovic, Oleg, Petković, Dušan, "Comparison of IRI-2016 and NEQUICK models of the ionosphere over the
Balkan Peninsula during the year 2019" in INTERNATIONAL CONFERENCE ON CONTEMPORARY THEORY AND PRACTICE IN CONSTRUCTION XV (2022):283-293,
https://doi.org/10.7251/STP2215283T . .

TY  - CONF
AU  - Grekulović, Sanja
AU  - Odalović, Oleg
AU  - Todorović Drakul, Miljana
AU  - Petković, Dušan
PY  - 2022
UR  - https://epslibrary.at/sgem_jresearch_publication_view.php?page=view&editid1=8492&
UR  - https://grafar.grf.bg.ac.rs/handle/123456789/3037
AB  - In 2004, a digital terrain model (DTM) was created in Serbia. It was obtained by vectorizing isohypses on topographic maps with a scale of 1: 25000. The resolution of the digital model of Serbia is 30 m, and the vertical accuracy, as the authors claim, is 10
m. From December 2021, the global model FABDEM (Forest And Buildings removed Copernicus DEM) is available to the public. It was created based on the data of the Copernicus GLO30 model so that data on forests and buildings were removed from it. Important features of the global model are its horizontal resolution of 30 m and vertical accuracy of less than 5 m. This paper aims to assess the vertical accuracy of the global FABDEM model and analyze the differences between the global FABDEM and DTM  in the territory of the Republic of Serbia. Vertical accuracy and analysis of the two models were assessed by comparing the heights derived from FABDEM and DTM with the heights of the independent set of points of the gravimetric survey of Serbia (GSS). The heights of the GSS points were determined using classical geodetic methods, and they are relatively uniformly distributed on the territory of the Republic of Serbia. A short description of mentioned comparison is presented in this paper. Statistical analysis results that compare terrestrial heights with heights derived from DTMs show minor differences between the two data sets.
PB  - SGEM, 51 Alexander Malinov blvd, Sofia, 1712, Bulgaria
C3  - 22nd International Multidisciplinary Scientific GeoConference SGEM 2022, Vol22, Issue 2.1
T1  - Estimation of vertical accuracy of digital terrain model FABDEM on the territory of the republic of Serbia
EP  - 210
IS  - 2.1
SP  - 203
VL  - 22
DO  - 10.5593/sgem2022/2.1/s09.25
ER  - 

@conference{
author = "Grekulović, Sanja and Odalović, Oleg and Todorović Drakul, Miljana and Petković, Dušan",
year = "2022",
abstract = "In 2004, a digital terrain model (DTM) was created in Serbia. It was obtained by vectorizing isohypses on topographic maps with a scale of 1: 25000. The resolution of the digital model of Serbia is 30 m, and the vertical accuracy, as the authors claim, is 10
m. From December 2021, the global model FABDEM (Forest And Buildings removed Copernicus DEM) is available to the public. It was created based on the data of the Copernicus GLO30 model so that data on forests and buildings were removed from it. Important features of the global model are its horizontal resolution of 30 m and vertical accuracy of less than 5 m. This paper aims to assess the vertical accuracy of the global FABDEM model and analyze the differences between the global FABDEM and DTM  in the territory of the Republic of Serbia. Vertical accuracy and analysis of the two models were assessed by comparing the heights derived from FABDEM and DTM with the heights of the independent set of points of the gravimetric survey of Serbia (GSS). The heights of the GSS points were determined using classical geodetic methods, and they are relatively uniformly distributed on the territory of the Republic of Serbia. A short description of mentioned comparison is presented in this paper. Statistical analysis results that compare terrestrial heights with heights derived from DTMs show minor differences between the two data sets.",
publisher = "SGEM, 51 Alexander Malinov blvd, Sofia, 1712, Bulgaria",
journal = "22nd International Multidisciplinary Scientific GeoConference SGEM 2022, Vol22, Issue 2.1",
title = "Estimation of vertical accuracy of digital terrain model FABDEM on the territory of the republic of Serbia",
pages = "210-203",
number = "2.1",
volume = "22",
doi = "10.5593/sgem2022/2.1/s09.25"
}

Grekulović, S., Odalović, O., Todorović Drakul, M.,& Petković, D.. (2022). Estimation of vertical accuracy of digital terrain model FABDEM on the territory of the republic of Serbia. in 22nd International Multidisciplinary Scientific GeoConference SGEM 2022, Vol22, Issue 2.1
SGEM, 51 Alexander Malinov blvd, Sofia, 1712, Bulgaria., 22(2.1), 203-210.
https://doi.org/10.5593/sgem2022/2.1/s09.25

Grekulović S, Odalović O, Todorović Drakul M, Petković D. Estimation of vertical accuracy of digital terrain model FABDEM on the territory of the republic of Serbia. in 22nd International Multidisciplinary Scientific GeoConference SGEM 2022, Vol22, Issue 2.1. 2022;22(2.1):203-210.
doi:10.5593/sgem2022/2.1/s09.25 .

Grekulović, Sanja, Odalović, Oleg, Todorović Drakul, Miljana, Petković, Dušan, "Estimation of vertical accuracy of digital terrain model FABDEM on the territory of the republic of Serbia" in 22nd International Multidisciplinary Scientific GeoConference SGEM 2022, Vol22, Issue 2.1, 22, no. 2.1 (2022):203-210,
https://doi.org/10.5593/sgem2022/2.1/s09.25 . .

TY  - CONF
AU  - Petković, Dušan
AU  - Odalović, Oleg
AU  - Nina, Aleksandra
PY  - 2022
UR  - asspectro2022.ipb.ac.rs/book-AsSpectro2022c.pdf
UR  - https://grafar.grf.bg.ac.rs/handle/123456789/2678
AB  - This paper analyzes variations in the total electron content in the D-region induced by periodical changes in the solar hydrogen Lyα radiation. The considered changes are a consequence of variations in the solar radiation intensity during a solar cycle and a consequence of the Earth's revolution. The presented analysis is based on the Quiet ionospheric D-region (QIonDR) model, which shows the dependencies of ionospheric parameters on the smoothed daily sunspot number and season. We consider the vertical and slant (for different zenith angles) total electron content in the D-region (TECD) which are important for calculations of delays of satellite signals. The obtained results show a significant influence of the considered zenith angle and period of the solar cycle and season on calculating the considered ionospheric parameter.
T1  - Influence of the periodic changes in the incoming solar hydrogen Ly-α radiation intensity on the total electron content in the ionospheric D-region
EP  - 43
SP  - 39
UR  - https://hdl.handle.net/21.15107/rcub_grafar_2678
ER  - 

@conference{
author = "Petković, Dušan and Odalović, Oleg and Nina, Aleksandra",
year = "2022",
abstract = "This paper analyzes variations in the total electron content in the D-region induced by periodical changes in the solar hydrogen Lyα radiation. The considered changes are a consequence of variations in the solar radiation intensity during a solar cycle and a consequence of the Earth's revolution. The presented analysis is based on the Quiet ionospheric D-region (QIonDR) model, which shows the dependencies of ionospheric parameters on the smoothed daily sunspot number and season. We consider the vertical and slant (for different zenith angles) total electron content in the D-region (TECD) which are important for calculations of delays of satellite signals. The obtained results show a significant influence of the considered zenith angle and period of the solar cycle and season on calculating the considered ionospheric parameter.",
title = "Influence of the periodic changes in the incoming solar hydrogen Ly-α radiation intensity on the total electron content in the ionospheric D-region",
pages = "43-39",
url = "https://hdl.handle.net/21.15107/rcub_grafar_2678"
}

Petković, D., Odalović, O.,& Nina, A.. (2022). Influence of the periodic changes in the incoming solar hydrogen Ly-α radiation intensity on the total electron content in the ionospheric D-region. , 39-43.
https://hdl.handle.net/21.15107/rcub_grafar_2678

Petković D, Odalović O, Nina A. Influence of the periodic changes in the incoming solar hydrogen Ly-α radiation intensity on the total electron content in the ionospheric D-region. 2022;:39-43.
https://hdl.handle.net/21.15107/rcub_grafar_2678 .

Petković, Dušan, Odalović, Oleg, Nina, Aleksandra, "Influence of the periodic changes in the incoming solar hydrogen Ly-α radiation intensity on the total electron content in the ionospheric D-region" (2022):39-43,
https://hdl.handle.net/21.15107/rcub_grafar_2678 .

TY  - CONF
AU  - Grekulović, Sanja
AU  - Paunković, Nikola
AU  - Petković, Dušan
AU  - Todorović-Drakul, Miljana
AU  - Ilijević, Slavica
PY  - 2022
UR  - https://grafar.grf.bg.ac.rs/handle/123456789/2664
AB  - Antenna phase center of GNSS receiver is the point where the signals transmitted from satellites are collected. However, this point is not necessarily the physical center of antenna (geometric center of antenna). In general, for most applications of GNSS, users consider the phase center to be a fixed point. But this point has its variation based on the direction of the radio signal source. Direction of incoming signal from satellite is definite with azimuth and elevation angle. Moreover, antenna phase centre is not only angle dependant, it also depends on the signal frequency. Variation of antenna phase center with the azimuth and elevation angle of incoming signal from satellite and with the frequency of incoming signal is used to called phase center variation. In geodesy (also as well in other areas), there are applications with high accuracy demands in terms of point precision (millimeter accuracy) or some other quantities. For those applications, users must consider the influence of phase center variation. With the appropriate settings, it is possible to estimate the variation of the phase center. The mean phase center and its variation can then be used in the software for GNSS data processing. In this paper, field procedure for estimation of antenna phase center is presented. On stable ground with a clear sky without any obstacles or sources of radiation nearby, a test field has been established. The test field contains two nearby points. Those points have been occupied in four sessions. Based on collected data, mean phase center has been determined, as well as the phase center differences from all four sessions and for each Global Navigation Satellite System independent (NAVSTAR GPS, GLONASS, GALILEO and BAIDOU). In addition, the expanded uncertainty of coordinates has been calculated.
PB  - University of Montenegro, Faculty of Civil Engineering
T1  - Field procedure for estimation of antenna phase center variation with expanded measurement uncertainty calculation
UR  - https://hdl.handle.net/21.15107/rcub_grafar_2664
ER  - 

@conference{
author = "Grekulović, Sanja and Paunković, Nikola and Petković, Dušan and Todorović-Drakul, Miljana and Ilijević, Slavica",
year = "2022",
abstract = "Antenna phase center of GNSS receiver is the point where the signals transmitted from satellites are collected. However, this point is not necessarily the physical center of antenna (geometric center of antenna). In general, for most applications of GNSS, users consider the phase center to be a fixed point. But this point has its variation based on the direction of the radio signal source. Direction of incoming signal from satellite is definite with azimuth and elevation angle. Moreover, antenna phase centre is not only angle dependant, it also depends on the signal frequency. Variation of antenna phase center with the azimuth and elevation angle of incoming signal from satellite and with the frequency of incoming signal is used to called phase center variation. In geodesy (also as well in other areas), there are applications with high accuracy demands in terms of point precision (millimeter accuracy) or some other quantities. For those applications, users must consider the influence of phase center variation. With the appropriate settings, it is possible to estimate the variation of the phase center. The mean phase center and its variation can then be used in the software for GNSS data processing. In this paper, field procedure for estimation of antenna phase center is presented. On stable ground with a clear sky without any obstacles or sources of radiation nearby, a test field has been established. The test field contains two nearby points. Those points have been occupied in four sessions. Based on collected data, mean phase center has been determined, as well as the phase center differences from all four sessions and for each Global Navigation Satellite System independent (NAVSTAR GPS, GLONASS, GALILEO and BAIDOU). In addition, the expanded uncertainty of coordinates has been calculated.",
publisher = "University of Montenegro, Faculty of Civil Engineering",
title = "Field procedure for estimation of antenna phase center variation with expanded measurement uncertainty calculation",
url = "https://hdl.handle.net/21.15107/rcub_grafar_2664"
}

Grekulović, S., Paunković, N., Petković, D., Todorović-Drakul, M.,& Ilijević, S.. (2022). Field procedure for estimation of antenna phase center variation with expanded measurement uncertainty calculation. 
University of Montenegro, Faculty of Civil Engineering..
https://hdl.handle.net/21.15107/rcub_grafar_2664

Grekulović S, Paunković N, Petković D, Todorović-Drakul M, Ilijević S. Field procedure for estimation of antenna phase center variation with expanded measurement uncertainty calculation. 2022;.
https://hdl.handle.net/21.15107/rcub_grafar_2664 .

Grekulović, Sanja, Paunković, Nikola, Petković, Dušan, Todorović-Drakul, Miljana, Ilijević, Slavica, "Field procedure for estimation of antenna phase center variation with expanded measurement uncertainty calculation" (2022),
https://hdl.handle.net/21.15107/rcub_grafar_2664 .

TY  - CONF
AU  - Босиочић, Станислава
AU  - Босиочић, Небојша
AU  - Petković, Dušan
AU  - Костић, Миодраг
PY  - 2020
UR  - https://symopis.sf.bg.ac.rs/download/Zbornik%20SYMOPIS%202020.pdf
UR  - https://grafar.grf.bg.ac.rs/handle/123456789/2233
AB  - Sa razvojem raþunara i softvera za obradu rasterskih slika zemljine površi, danas sve više dobijaju na  znaþaju  postupci  automatske  klasifikacije  zemljišnih  oblika.  U  radu  su  uporeÿeni  rezultati  automatske  i  TPI klasifikacije zemljišnih oblika u GIS okruženju. Danas se automatska klasifikacija þesto koristi u analizi reljefnih   formi   podruþja   od   interesa.   Metoda   se   bazira   na   digitalnom   modelu   terena   (DMT)   i   geomorfološkim parametrima koji se mogu izvesti iz matematiþkog modela površi. U ovom radu opisana je metoda  automatske  klasifikacije  zemljišnih  oblika  (unsuperevised  landform  classification)  i  puluautomatske  klasifikacije  zemljišnih  oblika  (superevised  landform  classification).  Za  primenu  metode  osim  DMT  u  radu  su korišüeni parametri: nagib zemljišta, planarna i profilna zakrivljenost i topografski pozicioni indeks (TPI) sa  modelima  susedstva.  Rezultati  su  pokazali  da  se  na  podruþju  od  interesa  nalaze  razliþite  morfografske  kategorije  reljefa.  Rezultati  klasifikacije  raÿeni  za  test  podruþje  dela  opštine  Novi  Pazar  potvrÿuju  da  se  automatske metode mogu koristiti u postupku klasifikacije reljefa.
AB  - With  the  development  of  computers  and  software  for  processing  raster  images  of  the  earth's  surface,  the  procedures  of  automatic  classification  of  landforms  are  becoming  more  and  more  important  today.  The  paper  compares  the  results  of  GIS  based  automatic  and  TPI  classification  of  landforms.Today,  automatic classification is often used in the analysis of relief forms of areas of interest. The method is based on   a   digital   terrain   model   (DMT)   and   geomorphological   parameters   that   can   be   derived   from   a   mathematical  surface  model.  This  paper  describes  the  method  of  automatic  landform  classification  and  superevised  landform  classification.  For  the  application  of  the  method,  apart  from  DMT,  the  following  parameters  were  used:  slope,  planar  and  profile  curvature  and  topographic  position  index  (TPI)  with  neighborhood models. The results showed that there are different morphographic categories of relief in the area of interest. The classification results made for the test area of the part of the municipality of Novi Pazar confirm that automatic methods can be used in the relief classification procedure.
PB  - University of Belgrade, Faculty of Transport and Traffic Engineering
T1  - Application of GIS based digital terrain models in the procedure of automatic classification of landforms
EP  - 98
SP  - 93
UR  - https://hdl.handle.net/21.15107/rcub_grafar_2233
ER  - 

@conference{
author = "Босиочић, Станислава and Босиочић, Небојша and Petković, Dušan and Костић, Миодраг",
year = "2020",
abstract = "Sa razvojem raþunara i softvera za obradu rasterskih slika zemljine površi, danas sve više dobijaju na  znaþaju  postupci  automatske  klasifikacije  zemljišnih  oblika.  U  radu  su  uporeÿeni  rezultati  automatske  i  TPI klasifikacije zemljišnih oblika u GIS okruženju. Danas se automatska klasifikacija þesto koristi u analizi reljefnih   formi   podruþja   od   interesa.   Metoda   se   bazira   na   digitalnom   modelu   terena   (DMT)   i   geomorfološkim parametrima koji se mogu izvesti iz matematiþkog modela površi. U ovom radu opisana je metoda  automatske  klasifikacije  zemljišnih  oblika  (unsuperevised  landform  classification)  i  puluautomatske  klasifikacije  zemljišnih  oblika  (superevised  landform  classification).  Za  primenu  metode  osim  DMT  u  radu  su korišüeni parametri: nagib zemljišta, planarna i profilna zakrivljenost i topografski pozicioni indeks (TPI) sa  modelima  susedstva.  Rezultati  su  pokazali  da  se  na  podruþju  od  interesa  nalaze  razliþite  morfografske  kategorije  reljefa.  Rezultati  klasifikacije  raÿeni  za  test  podruþje  dela  opštine  Novi  Pazar  potvrÿuju  da  se  automatske metode mogu koristiti u postupku klasifikacije reljefa., With  the  development  of  computers  and  software  for  processing  raster  images  of  the  earth's  surface,  the  procedures  of  automatic  classification  of  landforms  are  becoming  more  and  more  important  today.  The  paper  compares  the  results  of  GIS  based  automatic  and  TPI  classification  of  landforms.Today,  automatic classification is often used in the analysis of relief forms of areas of interest. The method is based on   a   digital   terrain   model   (DMT)   and   geomorphological   parameters   that   can   be   derived   from   a   mathematical  surface  model.  This  paper  describes  the  method  of  automatic  landform  classification  and  superevised  landform  classification.  For  the  application  of  the  method,  apart  from  DMT,  the  following  parameters  were  used:  slope,  planar  and  profile  curvature  and  topographic  position  index  (TPI)  with  neighborhood models. The results showed that there are different morphographic categories of relief in the area of interest. The classification results made for the test area of the part of the municipality of Novi Pazar confirm that automatic methods can be used in the relief classification procedure.",
publisher = "University of Belgrade, Faculty of Transport and Traffic Engineering",
title = "Application of GIS based digital terrain models in the procedure of automatic classification of landforms",
pages = "98-93",
url = "https://hdl.handle.net/21.15107/rcub_grafar_2233"
}

Босиочић, С., Босиочић, Н., Petković, D.,& Костић, М.. (2020). Application of GIS based digital terrain models in the procedure of automatic classification of landforms. 
University of Belgrade, Faculty of Transport and Traffic Engineering., 93-98.
https://hdl.handle.net/21.15107/rcub_grafar_2233

Босиочић С, Босиочић Н, Petković D, Костић М. Application of GIS based digital terrain models in the procedure of automatic classification of landforms. 2020;:93-98.
https://hdl.handle.net/21.15107/rcub_grafar_2233 .

Босиочић, Станислава, Босиочић, Небојша, Petković, Dušan, Костић, Миодраг, "Application of GIS based digital terrain models in the procedure of automatic classification of landforms" (2020):93-98,
https://hdl.handle.net/21.15107/rcub_grafar_2233 .

TY  - CONF
AU  - Odalović, Oleg
AU  - Joksimović, Danilo
AU  - Petković, Dušan
AU  - Stanković, Marko
AU  - Grekulović, Sanja
PY  - 2020
UR  - https://stepgrad.aggf.unibl.org/sr
UR  - https://grafar.grf.bg.ac.rs/handle/123456789/2006
AB  - Within this paper, we evaluated the quality of three Global Geopotential Models entitled: EGM96,
EGM2008, and GOCO05c. The models were evaluated by using 1001 terrestrial discrete values of height anomalies determined by Global Navigation Satellite Systems and normal heights, which we considered to be true values within this research. In addition to the quality evaluation, we tailored the models by using more than 80000 free air anomalies. The results obtained from the evaluation and tailoring indicate that by using the GOCO05c it is possible to determine a set of anomaly heights across Serbia, which are in agreement with terrestrial values with an average value of -7 cm, the standard deviation of ±9 cm and with the range of 44 cm.
AB  - У оквиру рада оцењен је квалитет три глобална гепотенцијална модела: EGM96, EGM2008 и GOCO05s. Квалитет модела је тестиран коришћењем 1001 условно тачних вредности
дискретних вредности аномалија висина које су претходно одређене применом (комбиновањем) Глобалних навигационих сателитских система и нормалних висина. Поред
наведеног, модели су и прилагођени територији Србије коришћењем више од 80000 аномалија слободног ваздуха. Резултати добијени из наведених одређивања указују да се
применом модела GOCO05c могу одредити аномалије висина на територији Србије које
апроксимирају терестрички одређене аномалије висина са средњом вредношћу од -7 cm,
стандардном девијацијом од ±9 cm и то у оквиру распона од 44 cm.
C3  - Међународна научна конференција ''Савремена теорија и пракса у градитељству XIV”
T1  - Evaluation and tailoring of global geopotential models in the determination of gravity field in Serbia
T1  - Оцена и тејлоровање глобалних геопотенцијалних модела при одређивању гравитационог поља на територији Србије
EP  - 90
SP  - 77
DO  - 10.7251/STP2014077O
ER  - 

@conference{
author = "Odalović, Oleg and Joksimović, Danilo and Petković, Dušan and Stanković, Marko and Grekulović, Sanja",
year = "2020",
abstract = "Within this paper, we evaluated the quality of three Global Geopotential Models entitled: EGM96,
EGM2008, and GOCO05c. The models were evaluated by using 1001 terrestrial discrete values of height anomalies determined by Global Navigation Satellite Systems and normal heights, which we considered to be true values within this research. In addition to the quality evaluation, we tailored the models by using more than 80000 free air anomalies. The results obtained from the evaluation and tailoring indicate that by using the GOCO05c it is possible to determine a set of anomaly heights across Serbia, which are in agreement with terrestrial values with an average value of -7 cm, the standard deviation of ±9 cm and with the range of 44 cm., У оквиру рада оцењен је квалитет три глобална гепотенцијална модела: EGM96, EGM2008 и GOCO05s. Квалитет модела је тестиран коришћењем 1001 условно тачних вредности
дискретних вредности аномалија висина које су претходно одређене применом (комбиновањем) Глобалних навигационих сателитских система и нормалних висина. Поред
наведеног, модели су и прилагођени територији Србије коришћењем више од 80000 аномалија слободног ваздуха. Резултати добијени из наведених одређивања указују да се
применом модела GOCO05c могу одредити аномалије висина на територији Србије које
апроксимирају терестрички одређене аномалије висина са средњом вредношћу од -7 cm,
стандардном девијацијом од ±9 cm и то у оквиру распона од 44 cm.",
journal = "Међународна научна конференција ''Савремена теорија и пракса у градитељству XIV”",
title = "Evaluation and tailoring of global geopotential models in the determination of gravity field in Serbia, Оцена и тејлоровање глобалних геопотенцијалних модела при одређивању гравитационог поља на територији Србије",
pages = "90-77",
doi = "10.7251/STP2014077O"
}

Odalović, O., Joksimović, D., Petković, D., Stanković, M.,& Grekulović, S.. (2020). Evaluation and tailoring of global geopotential models in the determination of gravity field in Serbia. in Међународна научна конференција ''Савремена теорија и пракса у градитељству XIV”, 77-90.
https://doi.org/10.7251/STP2014077O

Odalović O, Joksimović D, Petković D, Stanković M, Grekulović S. Evaluation and tailoring of global geopotential models in the determination of gravity field in Serbia. in Међународна научна конференција ''Савремена теорија и пракса у градитељству XIV”. 2020;:77-90.
doi:10.7251/STP2014077O .

Odalović, Oleg, Joksimović, Danilo, Petković, Dušan, Stanković, Marko, Grekulović, Sanja, "Evaluation and tailoring of global geopotential models in the determination of gravity field in Serbia" in Међународна научна конференција ''Савремена теорија и пракса у градитељству XIV” (2020):77-90,
https://doi.org/10.7251/STP2014077O . .

TY  - JOUR
AU  - Petković, Dušan
AU  - Pejić, Marko
PY  - 2019
UR  - https://scindeks.ceon.rs/Article.aspx?artid=0040-21761904507P
UR  - https://grafar.grf.bg.ac.rs/handle/123456789/1854
AB  - Терестричко ласерско скенирање (ТЛС) представља методу брзог прикупљања велике количине података у виду „облака тачака“ који нам касније представља основу за приказивање реалног стања „објекта“ у виду тродимензионалног модела и вршење разних анализа над њим. Перманентни развој технологије, хардвера и софтвера у претходних 10-ак година је у великој мери утицао на експанизију методе ТЛС-а, и на квалитет података који добијамо као резултат њене примене. Методу ТЛС-а можемо декларисати као једну од „најмлађих“ метода која се користи у геодезији, грађевинарству, архитектури, просторном планнирању и др. Међутим, методи ТЛС-а недостају јасно дефинисане и стандардизоване теренске процедуре као и методе испитивања и еталонирања инструмената и прибора који се користи. Такође, још увек не постоји међународни стандард који би унифицирао декларисање карактеристика инструмената од стране произвођача. 
У овом раду је дат преглед свих процеса и прорачуна у циљу успостављања метролошког полигона за потребе еталонирања терестричко ласерских скенера. Приказана је и анализа података прикупљених приликом еталонирања три модела терестричко ласерских скенера.
T2  - Техника
T1  - Еталонирање терестричких ласерских скенера у лабораторијским условима
IS  - 4
VL  - 74
DO  - 10.5937/tehnika1904507P
ER  - 

@article{
author = "Petković, Dušan and Pejić, Marko",
year = "2019",
abstract = "Терестричко ласерско скенирање (ТЛС) представља методу брзог прикупљања велике количине података у виду „облака тачака“ који нам касније представља основу за приказивање реалног стања „објекта“ у виду тродимензионалног модела и вршење разних анализа над њим. Перманентни развој технологије, хардвера и софтвера у претходних 10-ак година је у великој мери утицао на експанизију методе ТЛС-а, и на квалитет података који добијамо као резултат њене примене. Методу ТЛС-а можемо декларисати као једну од „најмлађих“ метода која се користи у геодезији, грађевинарству, архитектури, просторном планнирању и др. Међутим, методи ТЛС-а недостају јасно дефинисане и стандардизоване теренске процедуре као и методе испитивања и еталонирања инструмената и прибора који се користи. Такође, још увек не постоји међународни стандард који би унифицирао декларисање карактеристика инструмената од стране произвођача. 
У овом раду је дат преглед свих процеса и прорачуна у циљу успостављања метролошког полигона за потребе еталонирања терестричко ласерских скенера. Приказана је и анализа података прикупљених приликом еталонирања три модела терестричко ласерских скенера.",
journal = "Техника",
title = "Еталонирање терестричких ласерских скенера у лабораторијским условима",
number = "4",
volume = "74",
doi = "10.5937/tehnika1904507P"
}

Petković, D.,& Pejić, M.. (2019). Еталонирање терестричких ласерских скенера у лабораторијским условима. in Техника, 74(4).
https://doi.org/10.5937/tehnika1904507P

Petković D, Pejić M. Еталонирање терестричких ласерских скенера у лабораторијским условима. in Техника. 2019;74(4).
doi:10.5937/tehnika1904507P .

Petković, Dušan, Pejić, Marko, "Еталонирање терестричких ласерских скенера у лабораторијским условима" in Техника, 74, no. 4 (2019),
https://doi.org/10.5937/tehnika1904507P . .

TY  - CONF
AU  - Marković, Miloš
AU  - Stanković, Marko
AU  - Odalović, Oleg
AU  - Joksimović, Danilo
AU  - Petković, Dušan
PY  - 2019
UR  - https://www.sgem.org/index.php/elibrary?view=publication&task=show&id=5478
UR  - https://grafar.grf.bg.ac.rs/handle/123456789/1769
AB  - This paper presents the combined method of determining the deflection of vertical components ? and ? based on the precise levelling and GNSS measurements. In general, there are several methods, but the combined method simplifies data collecting and subsequent processing of results in comparison with other methods. Components determination was performed on the high precision levelling network in Serbia, by calculating undulation on each point, so as azimuth and length for each side of the network starting from reference point. The length of sides is in the range of 20 km to 300 km. A point approximately located in the middle of the network was chosen as a reference point. By applying least-squares method, the estimated values of the components were obtained. In addition to the statistical evaluation of the deflection of vertical components, the paper shows a comparison of the obtained values with the values from the global Geopotential models, which justifies using the combined method for networks of similar design.
C3  - 19th International Multidisciplinary Scientific GeoConference SGEM 2019
T1  - ESTIMATION OF THE DEFLECTION OF VERTICAL COMPONENTS USING PRECISE LEVELLING AND GNSS MEASUREMENTS ON HIGH PRECISION LEVELLING NETWORK OF SERBIA
IS  - 2.2
VL  - 19
DO  - 10.5593/sgem2019/2.2/S09.014
ER  - 

@conference{
author = "Marković, Miloš and Stanković, Marko and Odalović, Oleg and Joksimović, Danilo and Petković, Dušan",
year = "2019",
abstract = "This paper presents the combined method of determining the deflection of vertical components ? and ? based on the precise levelling and GNSS measurements. In general, there are several methods, but the combined method simplifies data collecting and subsequent processing of results in comparison with other methods. Components determination was performed on the high precision levelling network in Serbia, by calculating undulation on each point, so as azimuth and length for each side of the network starting from reference point. The length of sides is in the range of 20 km to 300 km. A point approximately located in the middle of the network was chosen as a reference point. By applying least-squares method, the estimated values of the components were obtained. In addition to the statistical evaluation of the deflection of vertical components, the paper shows a comparison of the obtained values with the values from the global Geopotential models, which justifies using the combined method for networks of similar design.",
journal = "19th International Multidisciplinary Scientific GeoConference SGEM 2019",
title = "ESTIMATION OF THE DEFLECTION OF VERTICAL COMPONENTS USING PRECISE LEVELLING AND GNSS MEASUREMENTS ON HIGH PRECISION LEVELLING NETWORK OF SERBIA",
number = "2.2",
volume = "19",
doi = "10.5593/sgem2019/2.2/S09.014"
}

Marković, M., Stanković, M., Odalović, O., Joksimović, D.,& Petković, D.. (2019). ESTIMATION OF THE DEFLECTION OF VERTICAL COMPONENTS USING PRECISE LEVELLING AND GNSS MEASUREMENTS ON HIGH PRECISION LEVELLING NETWORK OF SERBIA. in 19th International Multidisciplinary Scientific GeoConference SGEM 2019, 19(2.2).
https://doi.org/10.5593/sgem2019/2.2/S09.014

Marković M, Stanković M, Odalović O, Joksimović D, Petković D. ESTIMATION OF THE DEFLECTION OF VERTICAL COMPONENTS USING PRECISE LEVELLING AND GNSS MEASUREMENTS ON HIGH PRECISION LEVELLING NETWORK OF SERBIA. in 19th International Multidisciplinary Scientific GeoConference SGEM 2019. 2019;19(2.2).
doi:10.5593/sgem2019/2.2/S09.014 .

Marković, Miloš, Stanković, Marko, Odalović, Oleg, Joksimović, Danilo, Petković, Dušan, "ESTIMATION OF THE DEFLECTION OF VERTICAL COMPONENTS USING PRECISE LEVELLING AND GNSS MEASUREMENTS ON HIGH PRECISION LEVELLING NETWORK OF SERBIA" in 19th International Multidisciplinary Scientific GeoConference SGEM 2019, 19, no. 2.2 (2019),
https://doi.org/10.5593/sgem2019/2.2/S09.014 . .

TY  - CONF
AU  - Joksimović, Danilo
AU  - Stanković, Marko
AU  - Marković, Miloš
AU  - Petković, Dušan
AU  - Odalović, Oleg
PY  - 2019
UR  - https://www.sgem.org/index.php/elibrary-research-areas?view=publication&task=show&id=5484
UR  - https://grafar.grf.bg.ac.rs/handle/123456789/1768
AB  - This paperwork is dedicated to the research of the quality of height anomalies derived from the Global Geopotential Models GOCO over the Serbia territory. Three different types of approaches for the same model were considered: time wise, space wise and direct approach. The quality of the mentioned models is determined by comparison with terrestrial data of height anomalies, that are relate to the second high precision leveling network of the Republic of Serbia (the period of realization of tide gauges observations for determining the vertical position of the reference surface of the height reference system of the Republic of Serbia is 1971.0 years) and European Terrestrial Reference System 1989, realization ETRF2000, epoch 2010.63. By direct comparison, it was established that all models give almost identical data on the territory of Serbia and that with the application of the model one can approximate height anomalies at the territory of Serbia with a mean value of maximum 7 cm and with a standard deviation of 20 cm. Besides of this, models are compared in their spectral domains, with each other and with the model EGM2008, by comparison their degree and error degree variances.
C3  - International Multidisciplinary Scientific GeoConference-SGEM
T1  - Height anomalies determined by three different GOCO models
IS  - 2.2
VL  - 19
DO  - 10.5593/sgem2019/2.2/S09.020
ER  - 

@conference{
author = "Joksimović, Danilo and Stanković, Marko and Marković, Miloš and Petković, Dušan and Odalović, Oleg",
year = "2019",
abstract = "This paperwork is dedicated to the research of the quality of height anomalies derived from the Global Geopotential Models GOCO over the Serbia territory. Three different types of approaches for the same model were considered: time wise, space wise and direct approach. The quality of the mentioned models is determined by comparison with terrestrial data of height anomalies, that are relate to the second high precision leveling network of the Republic of Serbia (the period of realization of tide gauges observations for determining the vertical position of the reference surface of the height reference system of the Republic of Serbia is 1971.0 years) and European Terrestrial Reference System 1989, realization ETRF2000, epoch 2010.63. By direct comparison, it was established that all models give almost identical data on the territory of Serbia and that with the application of the model one can approximate height anomalies at the territory of Serbia with a mean value of maximum 7 cm and with a standard deviation of 20 cm. Besides of this, models are compared in their spectral domains, with each other and with the model EGM2008, by comparison their degree and error degree variances.",
journal = "International Multidisciplinary Scientific GeoConference-SGEM",
title = "Height anomalies determined by three different GOCO models",
number = "2.2",
volume = "19",
doi = "10.5593/sgem2019/2.2/S09.020"
}

Joksimović, D., Stanković, M., Marković, M., Petković, D.,& Odalović, O.. (2019). Height anomalies determined by three different GOCO models. in International Multidisciplinary Scientific GeoConference-SGEM, 19(2.2).
https://doi.org/10.5593/sgem2019/2.2/S09.020

Joksimović D, Stanković M, Marković M, Petković D, Odalović O. Height anomalies determined by three different GOCO models. in International Multidisciplinary Scientific GeoConference-SGEM. 2019;19(2.2).
doi:10.5593/sgem2019/2.2/S09.020 .

Joksimović, Danilo, Stanković, Marko, Marković, Miloš, Petković, Dušan, Odalović, Oleg, "Height anomalies determined by three different GOCO models" in International Multidisciplinary Scientific GeoConference-SGEM, 19, no. 2.2 (2019),
https://doi.org/10.5593/sgem2019/2.2/S09.020 . .

TY  - CONF
AU  - Petković, Dušan
AU  - Stojanović, Dijana
AU  - Kosić, Boris
AU  - Radosavljević, Marko
AU  - Stević, Zoran
AU  - Dragović, Magdalena
PY  - 2018
UR  - https://grafar.grf.bg.ac.rs/handle/123456789/1871
AB  - Contemporary visualization techniques rely on new technological achievements which offer information data collection in the form of a three-dimensional model. Such 3D model is significant in the area of cultural heritage protection and specifically in the restoration processes of ruined monuments. The results of applications of both methods, terrestrial laser scanning (TLS) and photogrammetry, is 3D data in the form of point cloud, which is a base for 3D modelling process in adequate software, and accordingly, a creation of an objects’ 3D shape. In this paper, the results of data collecting at the medieval site of the Savinac monastery (twelfth century ), performed in 2018, by using both contemporary methods, is presented. The visualization of this particular site is of the major importance for cultural heritge of Serbia.
PB  - Central Institute for Conservation, Belgrade
PB  - Scientific Association for the Development and Promotion of New Technologies, Sopot
C3  - Proceedings of selected papers and abstracts - The Second Students Scientific International Conference "Multidisciplinary Approach to Contemporary Research"
T1  - The visualization of the medieval site of the Savinac monastery
EP  - 194
SP  - 187
UR  - https://hdl.handle.net/21.15107/rcub_grafar_1871
ER  - 

@conference{
author = "Petković, Dušan and Stojanović, Dijana and Kosić, Boris and Radosavljević, Marko and Stević, Zoran and Dragović, Magdalena",
year = "2018",
abstract = "Contemporary visualization techniques rely on new technological achievements which offer information data collection in the form of a three-dimensional model. Such 3D model is significant in the area of cultural heritage protection and specifically in the restoration processes of ruined monuments. The results of applications of both methods, terrestrial laser scanning (TLS) and photogrammetry, is 3D data in the form of point cloud, which is a base for 3D modelling process in adequate software, and accordingly, a creation of an objects’ 3D shape. In this paper, the results of data collecting at the medieval site of the Savinac monastery (twelfth century ), performed in 2018, by using both contemporary methods, is presented. The visualization of this particular site is of the major importance for cultural heritge of Serbia.",
publisher = "Central Institute for Conservation, Belgrade, Scientific Association for the Development and Promotion of New Technologies, Sopot",
journal = "Proceedings of selected papers and abstracts - The Second Students Scientific International Conference "Multidisciplinary Approach to Contemporary Research"",
title = "The visualization of the medieval site of the Savinac monastery",
pages = "194-187",
url = "https://hdl.handle.net/21.15107/rcub_grafar_1871"
}

Petković, D., Stojanović, D., Kosić, B., Radosavljević, M., Stević, Z.,& Dragović, M.. (2018). The visualization of the medieval site of the Savinac monastery. in Proceedings of selected papers and abstracts - The Second Students Scientific International Conference "Multidisciplinary Approach to Contemporary Research"
Central Institute for Conservation, Belgrade., 187-194.
https://hdl.handle.net/21.15107/rcub_grafar_1871

Petković D, Stojanović D, Kosić B, Radosavljević M, Stević Z, Dragović M. The visualization of the medieval site of the Savinac monastery. in Proceedings of selected papers and abstracts - The Second Students Scientific International Conference "Multidisciplinary Approach to Contemporary Research". 2018;:187-194.
https://hdl.handle.net/21.15107/rcub_grafar_1871 .

Petković, Dušan, Stojanović, Dijana, Kosić, Boris, Radosavljević, Marko, Stević, Zoran, Dragović, Magdalena, "The visualization of the medieval site of the Savinac monastery" in Proceedings of selected papers and abstracts - The Second Students Scientific International Conference "Multidisciplinary Approach to Contemporary Research" (2018):187-194,
https://hdl.handle.net/21.15107/rcub_grafar_1871 .