TY  - JOUR
AU  - Odalović, Oleg
AU  - Medved, Klemen
AU  - Naod, Sofija
PY  - 2022
UR  - https://grafar.grf.bg.ac.rs/handle/123456789/2725
AB  - Vertical gravity gradient, as a change of gravity with the change in height, is a significant physical quantity used in many geodetic and geophysical modeling applications. In this research, we used a normal gravity field and digital terrain models to model the vertical gravity gradient without using other sources of information such as global geopotential models, results of gravity measurements, or digital density models of topographic masses. We measured vertical gravity gradients by relative gravimeters at 120 points, which we used as validation values for a typical forward modeling problem. In all calculations, we assumed a constant density of topographic masses above the ellipsoid and accounted for the effects of the Earth's curvature. In the territory of Slovenia, where a digital terrain model with a resolution of 1 × 1 m is available, the differences between the measured and modeled values of the vertical gravity gradients are on average − 9.3 μGal/m with a standard deviation of 12.3 μGal/m. For the territory of Serbia, using a digital terrain model with a resolution of 25 × 25 m, the same differences were obtained with an average of − 7.8 μGal/m and a standard deviation of 21.4 μGal/m. It can be said that the quality of the modeled values of vertical gravity gradients is directly related to the resolution of the digital terrain model.
T2  - Journal of Geodesy, Springer
T1  - Modeling of vertical gravity gradient by normal gravity field and digital terrain models
VL  - 96
DO  - 10.1007/s00190-022-01669-y
ER  - 

@article{
author = "Odalović, Oleg and Medved, Klemen and Naod, Sofija",
year = "2022",
abstract = "Vertical gravity gradient, as a change of gravity with the change in height, is a significant physical quantity used in many geodetic and geophysical modeling applications. In this research, we used a normal gravity field and digital terrain models to model the vertical gravity gradient without using other sources of information such as global geopotential models, results of gravity measurements, or digital density models of topographic masses. We measured vertical gravity gradients by relative gravimeters at 120 points, which we used as validation values for a typical forward modeling problem. In all calculations, we assumed a constant density of topographic masses above the ellipsoid and accounted for the effects of the Earth's curvature. In the territory of Slovenia, where a digital terrain model with a resolution of 1 × 1 m is available, the differences between the measured and modeled values of the vertical gravity gradients are on average − 9.3 μGal/m with a standard deviation of 12.3 μGal/m. For the territory of Serbia, using a digital terrain model with a resolution of 25 × 25 m, the same differences were obtained with an average of − 7.8 μGal/m and a standard deviation of 21.4 μGal/m. It can be said that the quality of the modeled values of vertical gravity gradients is directly related to the resolution of the digital terrain model.",
journal = "Journal of Geodesy, Springer",
title = "Modeling of vertical gravity gradient by normal gravity field and digital terrain models",
volume = "96",
doi = "10.1007/s00190-022-01669-y"
}

Odalović, O., Medved, K.,& Naod, S.. (2022). Modeling of vertical gravity gradient by normal gravity field and digital terrain models. in Journal of Geodesy, Springer, 96.
https://doi.org/10.1007/s00190-022-01669-y

Odalović O, Medved K, Naod S. Modeling of vertical gravity gradient by normal gravity field and digital terrain models. in Journal of Geodesy, Springer. 2022;96.
doi:10.1007/s00190-022-01669-y .

Odalović, Oleg, Medved, Klemen, Naod, Sofija, "Modeling of vertical gravity gradient by normal gravity field and digital terrain models" in Journal of Geodesy, Springer, 96 (2022),
https://doi.org/10.1007/s00190-022-01669-y . .

TY  - JOUR
AU  - Naod, Sofija
AU  - Odalović, Oleg
AU  - Brajović, Ljiljana
AU  - Savanović, Rajko
PY  - 2021
UR  - https://grafar.grf.bg.ac.rs/handle/123456789/2286
AB  - Imperial hegemony established by the Habsburg Monarchy relied upon proper mapping during its conquests. The need for the development of geodesy and establishing reference frames was important. Until the end of the First World War, Vojvodina belonged to the Austrian-Hungarian Empire, so all of its surveys were carried out as part of many organized land surveys in the Monarchy. Today, more than 100 years after Vojvodina became the Autonomous Province of Serbia, the network developed by the Monarchy and cadastral plans from that period are still in use. In this paper, in addition to a historical overview of military and cadastral surveys in Vojvodina, we will show data that have historical significance and are available on the Internet and in historical archives. We will also emphasize how the maps available in historical archives of the neighbouring countries could have been used to set up Serbian national spatial data infrastructure.
T2  - Survey Review
T1  - History of geodetic works in Vojvodina (Northern Serbia) and use of old maps in Serbian national spatial data infrastructure
DO  - 10.1080/00396265.2021.1886546
ER  - 

@article{
author = "Naod, Sofija and Odalović, Oleg and Brajović, Ljiljana and Savanović, Rajko",
year = "2021",
abstract = "Imperial hegemony established by the Habsburg Monarchy relied upon proper mapping during its conquests. The need for the development of geodesy and establishing reference frames was important. Until the end of the First World War, Vojvodina belonged to the Austrian-Hungarian Empire, so all of its surveys were carried out as part of many organized land surveys in the Monarchy. Today, more than 100 years after Vojvodina became the Autonomous Province of Serbia, the network developed by the Monarchy and cadastral plans from that period are still in use. In this paper, in addition to a historical overview of military and cadastral surveys in Vojvodina, we will show data that have historical significance and are available on the Internet and in historical archives. We will also emphasize how the maps available in historical archives of the neighbouring countries could have been used to set up Serbian national spatial data infrastructure.",
journal = "Survey Review",
title = "History of geodetic works in Vojvodina (Northern Serbia) and use of old maps in Serbian national spatial data infrastructure",
doi = "10.1080/00396265.2021.1886546"
}

Naod, S., Odalović, O., Brajović, L.,& Savanović, R.. (2021). History of geodetic works in Vojvodina (Northern Serbia) and use of old maps in Serbian national spatial data infrastructure. in Survey Review.
https://doi.org/10.1080/00396265.2021.1886546

Naod S, Odalović O, Brajović L, Savanović R. History of geodetic works in Vojvodina (Northern Serbia) and use of old maps in Serbian national spatial data infrastructure. in Survey Review. 2021;.
doi:10.1080/00396265.2021.1886546 .

Naod, Sofija, Odalović, Oleg, Brajović, Ljiljana, Savanović, Rajko, "History of geodetic works in Vojvodina (Northern Serbia) and use of old maps in Serbian national spatial data infrastructure" in Survey Review (2021),
https://doi.org/10.1080/00396265.2021.1886546 . .

TY  - JOUR
AU  - Moamen Awad, Habib Gad
AU  - Odalović, Oleg
AU  - Naod, Sofija
PY  - 2020
UR  - https://grafar.grf.bg.ac.rs/handle/123456789/2201
AB  - This paper presents an attempt to consider whether it is
possible to determine a geoid at the centimetre level in the
territory of Egypt based on recently available global and local
gravity field data. The paper has two main objectives. Firstly,
the paper overviews previously published geoid solutions,
while the second objective investigates the performance of
the recent global geopotential models (GGM) in Egypt.
The existing geoid solutions have illustrated that there
is an insufficient distribution of data which is sampled
inconsistently. At this time, data deficiency still exists, and to
overcome it, we have selected a "data window" and applied
the Least Square Collocation (LSC) technique. The outcome
from LSC was interesting and acceptable, and we obtained
a "sample" geoid that has a standard deviation of 11 cm for
the external control points.
T2  - GEODETSKI VESTNIK
T1  - Possibility to determine highly precise geoid for Egypt territory
VL  - 64
DO  - 10.15292/geodetski-vestnik.2020.04.578-593
ER  - 

@article{
author = "Moamen Awad, Habib Gad and Odalović, Oleg and Naod, Sofija",
year = "2020",
abstract = "This paper presents an attempt to consider whether it is
possible to determine a geoid at the centimetre level in the
territory of Egypt based on recently available global and local
gravity field data. The paper has two main objectives. Firstly,
the paper overviews previously published geoid solutions,
while the second objective investigates the performance of
the recent global geopotential models (GGM) in Egypt.
The existing geoid solutions have illustrated that there
is an insufficient distribution of data which is sampled
inconsistently. At this time, data deficiency still exists, and to
overcome it, we have selected a "data window" and applied
the Least Square Collocation (LSC) technique. The outcome
from LSC was interesting and acceptable, and we obtained
a "sample" geoid that has a standard deviation of 11 cm for
the external control points.",
journal = "GEODETSKI VESTNIK",
title = "Possibility to determine highly precise geoid for Egypt territory",
volume = "64",
doi = "10.15292/geodetski-vestnik.2020.04.578-593"
}

Moamen Awad, H. G., Odalović, O.,& Naod, S.. (2020). Possibility to determine highly precise geoid for Egypt territory. in GEODETSKI VESTNIK, 64.
https://doi.org/10.15292/geodetski-vestnik.2020.04.578-593

Moamen Awad HG, Odalović O, Naod S. Possibility to determine highly precise geoid for Egypt territory. in GEODETSKI VESTNIK. 2020;64.
doi:10.15292/geodetski-vestnik.2020.04.578-593 .

Moamen Awad, Habib Gad, Odalović, Oleg, Naod, Sofija, "Possibility to determine highly precise geoid for Egypt territory" in GEODETSKI VESTNIK, 64 (2020),
https://doi.org/10.15292/geodetski-vestnik.2020.04.578-593 . .

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

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

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

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

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

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

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

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

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

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