TY  - GEN
AU  - Ogrizović, Vukan
AU  - Mišković, Zoran
AU  - Sovilj, Platon
AU  - Damjanović, Srđan
AU  - Naumović-Vuković, Dragana
AU  - Gabrić, Ognjen
AU  - Pejić, Dragan
AU  - Urekar, Marjan
PY  - 2022
UR  - https://grafar.grf.bg.ac.rs/handle/123456789/3048
AB  - Društvo metrologa je formirano u cilju objedinjavanja aktivnosti svih metrologa, pružanju pomoći prilikom njihovog rada i međusobne razmene iskustava.

Misija Društva metrologa je da okuplja i podstiče stručnjake koji se bave metrologijom, ili srodnim disciplinama, da međusobno razvijaju kreativnu inicijativu za njen dalji razvoj i unapređenje, prati razvoj metrologije i ukazuje na tokove, zbivanja i promene u ovoj oblasti i da se povezuje sa sličnim naučnim, stručnim i drugim organizacijama, domaćim ili međunarodnim, radi promocije metrologije.

Osnovni ciljevi Društva:

Okupljanje stručnjaka iz oblasti metrologije
Praćenje razvoja metrologije
Priprema standarda od značaja za struku
Sarađivanje kod izrade propisa iz oblasti metrologije
Izdavanje publikacija i časopisa iz oblasti metrologije
Organizovanje simpozijuma o mernoj opremi
T2  - Kongres metrologa 2022
T1  - Kongres metrologa 2022 - Naučni odbor
UR  - https://hdl.handle.net/21.15107/rcub_grafar_3048
ER  - 

@misc{
author = "Ogrizović, Vukan and Mišković, Zoran and Sovilj, Platon and Damjanović, Srđan and Naumović-Vuković, Dragana and Gabrić, Ognjen and Pejić, Dragan and Urekar, Marjan",
year = "2022",
abstract = "Društvo metrologa je formirano u cilju objedinjavanja aktivnosti svih metrologa, pružanju pomoći prilikom njihovog rada i međusobne razmene iskustava.

Misija Društva metrologa je da okuplja i podstiče stručnjake koji se bave metrologijom, ili srodnim disciplinama, da međusobno razvijaju kreativnu inicijativu za njen dalji razvoj i unapređenje, prati razvoj metrologije i ukazuje na tokove, zbivanja i promene u ovoj oblasti i da se povezuje sa sličnim naučnim, stručnim i drugim organizacijama, domaćim ili međunarodnim, radi promocije metrologije.

Osnovni ciljevi Društva:

Okupljanje stručnjaka iz oblasti metrologije
Praćenje razvoja metrologije
Priprema standarda od značaja za struku
Sarađivanje kod izrade propisa iz oblasti metrologije
Izdavanje publikacija i časopisa iz oblasti metrologije
Organizovanje simpozijuma o mernoj opremi",
journal = "Kongres metrologa 2022",
title = "Kongres metrologa 2022 - Naučni odbor",
url = "https://hdl.handle.net/21.15107/rcub_grafar_3048"
}

Ogrizović, V., Mišković, Z., Sovilj, P., Damjanović, S., Naumović-Vuković, D., Gabrić, O., Pejić, D.,& Urekar, M.. (2022). Kongres metrologa 2022 - Naučni odbor. in Kongres metrologa 2022.
https://hdl.handle.net/21.15107/rcub_grafar_3048

Ogrizović V, Mišković Z, Sovilj P, Damjanović S, Naumović-Vuković D, Gabrić O, Pejić D, Urekar M. Kongres metrologa 2022 - Naučni odbor. in Kongres metrologa 2022. 2022;.
https://hdl.handle.net/21.15107/rcub_grafar_3048 .

Ogrizović, Vukan, Mišković, Zoran, Sovilj, Platon, Damjanović, Srđan, Naumović-Vuković, Dragana, Gabrić, Ognjen, Pejić, Dragan, Urekar, Marjan, "Kongres metrologa 2022 - Naučni odbor" in Kongres metrologa 2022 (2022),
https://hdl.handle.net/21.15107/rcub_grafar_3048 .

TY  - CONF
AU  - Ogrizović, Vukan
AU  - Mišković, Zoran
PY  - 2015
UR  - https://grafar.grf.bg.ac.rs/handle/123456789/1291
AB  - Global Navigation Satellite System Reflectometry (GNSS-R) is a promising technology with a huge potential. Naming just few most interesting applications, remote sensing of the sea surface roughness and salinity, snow structures, and sea-ice characterization, we can realize the importance of GNSS-R. Due to a variety of possible platforms (satellites, aircrafts, helicopters, etc.) different resolutions are available for the final users, which imply, also, different scopes of the accuracy. In this paper we are testing the resolution and accuracy of a water surface level obtained by GNSS-R. We utilizied a platform set to a pedestrian bridge, with two GNSS receivers. One of them is attached to the upper side of the platform, while the other is placed upside-down, directing to the water mirror. The upper GNSS will receive only the direct signals from the satellites, while the latter one will create its position only according to the „false“ measurements, meaning the signals reflected from the water. Knowing the mutual positional relation between the two receivers, we can calculate the height of the water mirror and, after longer measuring sessions, monitor the change of the river level.
PB  - FIG, Sofia
C3  - FIG Working Week 2015: From the Wisdom of the Ages to the Challenges of the Modern World Sofia, Bulgaria, 17-21 May 2015
T1  - Testing the Accuracy of Large-Scale GNSS-R Applications
EP  - 14
SP  - 1
UR  - https://hdl.handle.net/21.15107/rcub_grafar_1291
ER  - 

@conference{
author = "Ogrizović, Vukan and Mišković, Zoran",
year = "2015",
abstract = "Global Navigation Satellite System Reflectometry (GNSS-R) is a promising technology with a huge potential. Naming just few most interesting applications, remote sensing of the sea surface roughness and salinity, snow structures, and sea-ice characterization, we can realize the importance of GNSS-R. Due to a variety of possible platforms (satellites, aircrafts, helicopters, etc.) different resolutions are available for the final users, which imply, also, different scopes of the accuracy. In this paper we are testing the resolution and accuracy of a water surface level obtained by GNSS-R. We utilizied a platform set to a pedestrian bridge, with two GNSS receivers. One of them is attached to the upper side of the platform, while the other is placed upside-down, directing to the water mirror. The upper GNSS will receive only the direct signals from the satellites, while the latter one will create its position only according to the „false“ measurements, meaning the signals reflected from the water. Knowing the mutual positional relation between the two receivers, we can calculate the height of the water mirror and, after longer measuring sessions, monitor the change of the river level.",
publisher = "FIG, Sofia",
journal = "FIG Working Week 2015: From the Wisdom of the Ages to the Challenges of the Modern World Sofia, Bulgaria, 17-21 May 2015",
title = "Testing the Accuracy of Large-Scale GNSS-R Applications",
pages = "14-1",
url = "https://hdl.handle.net/21.15107/rcub_grafar_1291"
}

Ogrizović, V.,& Mišković, Z.. (2015). Testing the Accuracy of Large-Scale GNSS-R Applications. in FIG Working Week 2015: From the Wisdom of the Ages to the Challenges of the Modern World Sofia, Bulgaria, 17-21 May 2015
FIG, Sofia., 1-14.
https://hdl.handle.net/21.15107/rcub_grafar_1291

Ogrizović V, Mišković Z. Testing the Accuracy of Large-Scale GNSS-R Applications. in FIG Working Week 2015: From the Wisdom of the Ages to the Challenges of the Modern World Sofia, Bulgaria, 17-21 May 2015. 2015;:1-14.
https://hdl.handle.net/21.15107/rcub_grafar_1291 .

Ogrizović, Vukan, Mišković, Zoran, "Testing the Accuracy of Large-Scale GNSS-R Applications" in FIG Working Week 2015: From the Wisdom of the Ages to the Challenges of the Modern World Sofia, Bulgaria, 17-21 May 2015 (2015):1-14,
https://hdl.handle.net/21.15107/rcub_grafar_1291 .

TY  - JOUR
AU  - Pejić, Marko
AU  - Ogrizović, Vukan
AU  - Božić, Branko
AU  - Milovanović, Branko
AU  - Marošan, Stevan
PY  - 2014
UR  - https://grafar.grf.bg.ac.rs/handle/123456789/606
AB  - This paper presents a simplified test procedure of the terrestrial laser scanners (TLS) accuracy investigation by the general criteria of the ISO17123 standard. The proposed procedure covers investigation, analysis and accuracy estimation of the TLS system in the controlled environmental conditions. This procedure is mainly developed based on the model of a system calibration and network design procedures. Metrological Laboratory of the Faculty of Civil Engineering in Belgrade is customized for TLS testing. The accuracy investigation of a commercial TLS has been performed. The accuracy of the resulted point cloud, which is indirectly represented by the coordinates of the acquired control points, is determined. Beside the analysis of the residuals of the 3D spatial transformation, the analysis of the true and the measured distance differences is also performed. The results show that these two approaches give the statistically same uncertainty indicators. Precision of the target recognition and influence of the unlevelled point cloud to the TLS centering error is also analyzed. Normality tests are used to determine whether a data set is well modeled by a normal distribution or not before testing of hypothesis for the variances. By varying the number of the control and check points it is shown that increasing the number of the control points more than three well distributed is not relevant for significantly higher transformation accuracy. On the basis of the conducted spherical orientation analyzes it can be concluded that the global orientation of the error vectors follows the laser beam direction due to relatively short distances. The most important result related to investigated TLS is that this particular sensor must be used only by indirect georeferencing experiment design.
PB  - Elsevier B.V.
T2  - Measurement
T1  - A simplified procedure of metrological testing of the terrestrial laser scanners
EP  - 269
SP  - 260
VL  - 53
DO  - 10.1016/j.measurement.2014.03.024
ER  - 

@article{
author = "Pejić, Marko and Ogrizović, Vukan and Božić, Branko and Milovanović, Branko and Marošan, Stevan",
year = "2014",
abstract = "This paper presents a simplified test procedure of the terrestrial laser scanners (TLS) accuracy investigation by the general criteria of the ISO17123 standard. The proposed procedure covers investigation, analysis and accuracy estimation of the TLS system in the controlled environmental conditions. This procedure is mainly developed based on the model of a system calibration and network design procedures. Metrological Laboratory of the Faculty of Civil Engineering in Belgrade is customized for TLS testing. The accuracy investigation of a commercial TLS has been performed. The accuracy of the resulted point cloud, which is indirectly represented by the coordinates of the acquired control points, is determined. Beside the analysis of the residuals of the 3D spatial transformation, the analysis of the true and the measured distance differences is also performed. The results show that these two approaches give the statistically same uncertainty indicators. Precision of the target recognition and influence of the unlevelled point cloud to the TLS centering error is also analyzed. Normality tests are used to determine whether a data set is well modeled by a normal distribution or not before testing of hypothesis for the variances. By varying the number of the control and check points it is shown that increasing the number of the control points more than three well distributed is not relevant for significantly higher transformation accuracy. On the basis of the conducted spherical orientation analyzes it can be concluded that the global orientation of the error vectors follows the laser beam direction due to relatively short distances. The most important result related to investigated TLS is that this particular sensor must be used only by indirect georeferencing experiment design.",
publisher = "Elsevier B.V.",
journal = "Measurement",
title = "A simplified procedure of metrological testing of the terrestrial laser scanners",
pages = "269-260",
volume = "53",
doi = "10.1016/j.measurement.2014.03.024"
}

Pejić, M., Ogrizović, V., Božić, B., Milovanović, B.,& Marošan, S.. (2014). A simplified procedure of metrological testing of the terrestrial laser scanners. in Measurement
Elsevier B.V.., 53, 260-269.
https://doi.org/10.1016/j.measurement.2014.03.024

Pejić M, Ogrizović V, Božić B, Milovanović B, Marošan S. A simplified procedure of metrological testing of the terrestrial laser scanners. in Measurement. 2014;53:260-269.
doi:10.1016/j.measurement.2014.03.024 .

Pejić, Marko, Ogrizović, Vukan, Božić, Branko, Milovanović, Branko, Marošan, Stevan, "A simplified procedure of metrological testing of the terrestrial laser scanners" in Measurement, 53 (2014):260-269,
https://doi.org/10.1016/j.measurement.2014.03.024 . .

TY  - CONF
AU  - Gučević, Jelena
AU  - Delčev, Siniša
AU  - Ogrizović, Vukan
AU  - Pejić, Marko
AU  - Popović, Jovan
AU  - Pejović, Milutin
PY  - 2014
UR  - https://grafar.grf.bg.ac.rs/handle/123456789/1173
PB  - Czech Technical University in Prague, Prague
C3  - Proceedings of the 6th International Conference on Engineering Surveying - INGEO 2014
T1  - Geodetic works during the estimation of the vertical displacement of a bridge under a load test
EP  - 242
SP  - 237
UR  - https://hdl.handle.net/21.15107/rcub_grafar_1173
ER  - 

@conference{
author = "Gučević, Jelena and Delčev, Siniša and Ogrizović, Vukan and Pejić, Marko and Popović, Jovan and Pejović, Milutin",
year = "2014",
publisher = "Czech Technical University in Prague, Prague",
journal = "Proceedings of the 6th International Conference on Engineering Surveying - INGEO 2014",
title = "Geodetic works during the estimation of the vertical displacement of a bridge under a load test",
pages = "242-237",
url = "https://hdl.handle.net/21.15107/rcub_grafar_1173"
}

Gučević, J., Delčev, S., Ogrizović, V., Pejić, M., Popović, J.,& Pejović, M.. (2014). Geodetic works during the estimation of the vertical displacement of a bridge under a load test. in Proceedings of the 6th International Conference on Engineering Surveying - INGEO 2014
Czech Technical University in Prague, Prague., 237-242.
https://hdl.handle.net/21.15107/rcub_grafar_1173

Gučević J, Delčev S, Ogrizović V, Pejić M, Popović J, Pejović M. Geodetic works during the estimation of the vertical displacement of a bridge under a load test. in Proceedings of the 6th International Conference on Engineering Surveying - INGEO 2014. 2014;:237-242.
https://hdl.handle.net/21.15107/rcub_grafar_1173 .

Gučević, Jelena, Delčev, Siniša, Ogrizović, Vukan, Pejić, Marko, Popović, Jovan, Pejović, Milutin, "Geodetic works during the estimation of the vertical displacement of a bridge under a load test" in Proceedings of the 6th International Conference on Engineering Surveying - INGEO 2014 (2014):237-242,
https://hdl.handle.net/21.15107/rcub_grafar_1173 .

TY  - CONF
AU  - Delčev, Siniša
AU  - Pejić, Marko
AU  - Gučević, Jelena
AU  - Ogrizović, Vukan
PY  - 2011
UR  - https://grafar.grf.bg.ac.rs/handle/123456789/359
AB  - Surveying instruments have to meet certain specifications in order to provide the necessary accuracy standards for a certain application. The main purpose of testing a used terrestrial laser scanner (TLS) is does an instrument still meets factory accuracy standards or not. This paper outlines the procedures for the investigation of the TLS accuracy in laboratory conditions without high expensive equipment e.g. a calibration track line and a laser interferometer. The test field contains control targets and observation pillars. 3D position of the pillars and the targets are derived from an adjustment of highly precise measurements and they are considered as a true standard compared with the scanned data. A proper statistical model of the data analysis is proposed. In addition to the theoretic model, a particular sample of the highly precise TLS measurements is analyzed.
C3  - 10th Imeko Symposium: Laser Metrology for Precision Measurement and Inspection in Industry (Lmpmi) 2
T1  - A Procedure for accuracy Investigation of Terrestrial Laser Scanners
EP  - 280
SP  - 273
VL  - 2156
UR  - https://hdl.handle.net/21.15107/rcub_grafar_359
ER  - 

@conference{
author = "Delčev, Siniša and Pejić, Marko and Gučević, Jelena and Ogrizović, Vukan",
year = "2011",
abstract = "Surveying instruments have to meet certain specifications in order to provide the necessary accuracy standards for a certain application. The main purpose of testing a used terrestrial laser scanner (TLS) is does an instrument still meets factory accuracy standards or not. This paper outlines the procedures for the investigation of the TLS accuracy in laboratory conditions without high expensive equipment e.g. a calibration track line and a laser interferometer. The test field contains control targets and observation pillars. 3D position of the pillars and the targets are derived from an adjustment of highly precise measurements and they are considered as a true standard compared with the scanned data. A proper statistical model of the data analysis is proposed. In addition to the theoretic model, a particular sample of the highly precise TLS measurements is analyzed.",
journal = "10th Imeko Symposium: Laser Metrology for Precision Measurement and Inspection in Industry (Lmpmi) 2",
title = "A Procedure for accuracy Investigation of Terrestrial Laser Scanners",
pages = "280-273",
volume = "2156",
url = "https://hdl.handle.net/21.15107/rcub_grafar_359"
}

Delčev, S., Pejić, M., Gučević, J.,& Ogrizović, V.. (2011). A Procedure for accuracy Investigation of Terrestrial Laser Scanners. in 10th Imeko Symposium: Laser Metrology for Precision Measurement and Inspection in Industry (Lmpmi) 2, 2156, 273-280.
https://hdl.handle.net/21.15107/rcub_grafar_359

Delčev S, Pejić M, Gučević J, Ogrizović V. A Procedure for accuracy Investigation of Terrestrial Laser Scanners. in 10th Imeko Symposium: Laser Metrology for Precision Measurement and Inspection in Industry (Lmpmi) 2. 2011;2156:273-280.
https://hdl.handle.net/21.15107/rcub_grafar_359 .

Delčev, Siniša, Pejić, Marko, Gučević, Jelena, Ogrizović, Vukan, "A Procedure for accuracy Investigation of Terrestrial Laser Scanners" in 10th Imeko Symposium: Laser Metrology for Precision Measurement and Inspection in Industry (Lmpmi) 2, 2156 (2011):273-280,
https://hdl.handle.net/21.15107/rcub_grafar_359 .

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 .

TY  - THES
AU  - Ogrizović, Vukan
PY  - 2007
UR  - https://grafar.grf.bg.ac.rs/handle/123456789/3499
AB  - Merni sistem, razvijen u okviru ove disertacije, namenjen je brzom i kvalitetnom izvođenju astrogeodetskih merenja i čine ga sledeće komponente:
•
optički instrument za precizno uspostavljanje pravca tangente lokalne vertikale (zenitlot),
•
profesionalna CCD kamera za registraciju snimka neba u okolini zenita,
•
posebno konstruisani sistem za održavanje vremena, baziran na GPS kontroleru,
•
prenosni račimar za upravljanje kamerom i snimcima i
•
prenosni računar sa instaliranim upravljačkim programom za održavanje vremena.
Implementacijom heterogenih savremenih mernih uređaja u sistem i njihovom softverskom integracijom omogućiće se obrada rezultata merenja neposredno po završetku merne sesije, čime se značajno ubrzava postupak određivanja komponenti vertikalskih otklona. Glavni doprinos metode je u potpunom isključenju opažačke greške iz procesa merenja.
AB  - The measuring system, developed within this dissertation, is dedicated to fast and efhciant performing of astro-geodetic determinations. It consists of the following components:
•
an optical instrument for precise determination of the local vertical tangent (zenitlot),
•
professional CCD camera for aquiring a sky picture near zenith,
•
specially contructed system for time-keeping purposes, based on a GPS controller,
•
a laptop for maintaining the camera, and
•
a laptop with a driver program for time registration.
Measured data can be processed soon after a measuring session, by assembling heterogenous advanced measuring devices into a system, as well as a special software integration. This will speed up the procedure of vertical deflection components determination. The main contribution of the method is the elimination of the observer error from the measuring process.
T1  - Konstrukcija savremenog mernog sistema za astrogeodetska određivanja
T1  - A Construction of an Advanced Measuring System for Astro-Geodetic Determinations
UR  - https://hdl.handle.net/21.15107/rcub_grafar_3499
ER  - 

@phdthesis{
author = "Ogrizović, Vukan",
year = "2007",
abstract = "Merni sistem, razvijen u okviru ove disertacije, namenjen je brzom i kvalitetnom izvođenju astrogeodetskih merenja i čine ga sledeće komponente:
•
optički instrument za precizno uspostavljanje pravca tangente lokalne vertikale (zenitlot),
•
profesionalna CCD kamera za registraciju snimka neba u okolini zenita,
•
posebno konstruisani sistem za održavanje vremena, baziran na GPS kontroleru,
•
prenosni račimar za upravljanje kamerom i snimcima i
•
prenosni računar sa instaliranim upravljačkim programom za održavanje vremena.
Implementacijom heterogenih savremenih mernih uređaja u sistem i njihovom softverskom integracijom omogućiće se obrada rezultata merenja neposredno po završetku merne sesije, čime se značajno ubrzava postupak određivanja komponenti vertikalskih otklona. Glavni doprinos metode je u potpunom isključenju opažačke greške iz procesa merenja., The measuring system, developed within this dissertation, is dedicated to fast and efhciant performing of astro-geodetic determinations. It consists of the following components:
•
an optical instrument for precise determination of the local vertical tangent (zenitlot),
•
professional CCD camera for aquiring a sky picture near zenith,
•
specially contructed system for time-keeping purposes, based on a GPS controller,
•
a laptop for maintaining the camera, and
•
a laptop with a driver program for time registration.
Measured data can be processed soon after a measuring session, by assembling heterogenous advanced measuring devices into a system, as well as a special software integration. This will speed up the procedure of vertical deflection components determination. The main contribution of the method is the elimination of the observer error from the measuring process.",
title = "Konstrukcija savremenog mernog sistema za astrogeodetska određivanja, A Construction of an Advanced Measuring System for Astro-Geodetic Determinations",
url = "https://hdl.handle.net/21.15107/rcub_grafar_3499"
}

Ogrizović, V.. (2007). Konstrukcija savremenog mernog sistema za astrogeodetska određivanja. .
https://hdl.handle.net/21.15107/rcub_grafar_3499

Ogrizović V. Konstrukcija savremenog mernog sistema za astrogeodetska određivanja. 2007;.
https://hdl.handle.net/21.15107/rcub_grafar_3499 .

Ogrizović, Vukan, "Konstrukcija savremenog mernog sistema za astrogeodetska određivanja" (2007),
https://hdl.handle.net/21.15107/rcub_grafar_3499 .

TY  - CONF
AU  - Odalović, Oleg
AU  - Gučević, Jelena
AU  - Ogrizović, Vukan
AU  - Aleksić, Ivan R.
PY  - 2003
UR  - https://grafar.grf.bg.ac.rs/handle/123456789/53
AB  - Components of vertical deflection as a function of anomaly potential are determined by using astrogeodetic or gravimetric methods. In this paper components of deflections obtained by astrogeodetic method were considered as conditionally correct and deflection of components determined by using gravimetric method, from conditionally correct values, were shown as digital terrain model quality functions and adopted hypothesis on the earth's crust masses density.
C3  - Proceedings of the Xiii National Conference of Yugoslav Astronomers
T1  - Analysis of vertical deflection differences obtained by astrogeodetic and gravimetric methods
EP  - 220
IS  - 75
SP  - 217
UR  - https://hdl.handle.net/21.15107/rcub_grafar_53
ER  - 

@conference{
author = "Odalović, Oleg and Gučević, Jelena and Ogrizović, Vukan and Aleksić, Ivan R.",
year = "2003",
abstract = "Components of vertical deflection as a function of anomaly potential are determined by using astrogeodetic or gravimetric methods. In this paper components of deflections obtained by astrogeodetic method were considered as conditionally correct and deflection of components determined by using gravimetric method, from conditionally correct values, were shown as digital terrain model quality functions and adopted hypothesis on the earth's crust masses density.",
journal = "Proceedings of the Xiii National Conference of Yugoslav Astronomers",
title = "Analysis of vertical deflection differences obtained by astrogeodetic and gravimetric methods",
pages = "220-217",
number = "75",
url = "https://hdl.handle.net/21.15107/rcub_grafar_53"
}

Odalović, O., Gučević, J., Ogrizović, V.,& Aleksić, I. R.. (2003). Analysis of vertical deflection differences obtained by astrogeodetic and gravimetric methods. in Proceedings of the Xiii National Conference of Yugoslav Astronomers(75), 217-220.
https://hdl.handle.net/21.15107/rcub_grafar_53

Odalović O, Gučević J, Ogrizović V, Aleksić IR. Analysis of vertical deflection differences obtained by astrogeodetic and gravimetric methods. in Proceedings of the Xiii National Conference of Yugoslav Astronomers. 2003;(75):217-220.
https://hdl.handle.net/21.15107/rcub_grafar_53 .

Odalović, Oleg, Gučević, Jelena, Ogrizović, Vukan, Aleksić, Ivan R., "Analysis of vertical deflection differences obtained by astrogeodetic and gravimetric methods" in Proceedings of the Xiii National Conference of Yugoslav Astronomers, no. 75 (2003):217-220,
https://hdl.handle.net/21.15107/rcub_grafar_53 .