@article{MTMT:34049353,
	title = {Monitoring Strategy of Geological Hazards Using Integrated Three-dimensional InSAR and GNSS Technologies with Case Study},
	url = {https://m2.mtmt.hu/api/publication/34049353},
	author = {Bányai, László and Bozsó, István and Szűcs, Eszter and Gribovszki, Katalin Eszter and Wesztergom, Viktor},
	doi = {10.3311/PPci.20009},
	journal-iso = {PERIOD POLYTECH CIV ENG},
	journal = {PERIODICA POLYTECHNICA-CIVIL ENGINEERING},
	volume = {67},
	unique-id = {34049353},
	issn = {0553-6626},
	abstract = {Geodetic/geodynamic benchmarks, equipped with both ascending and descending radar corner reflectors, and a method for integrated InSAR and GNSS/GPS network observation were developed and applied as the continuation of the former geodetic monitoring at the Dunaszekcső landslide, Hungary. The attempts to apply InSAR technologies using archive and Sentinel-1 data practically failed on the most intensive landside areas (“Vár” and “Szent János” hills), where proper persistent or distributed scatterers were not found. Our concept solved this problem, where the Simple Look Complex (SLC) images are used to interpolate the movements between two GNSS network observations using the integrated benchmarks and the method of Kalman-filtering. Since the InSAR line-of-sight (LOS) changes are barely sensitive to the north movements, this information is essentially provided by GNSS measurement alone, moreover, the GNSS measurements are used to: a) identify the benchmarks, b) detect the unwrapping errors and missing cycles and c) provide the boundary values of Kalman-filtering.After the installation of benchmarks three GPS observations were carried out and 69 ascending and 61 descending Sentinel-1 A and B images were processed. The data processing properly indicated the general movement history, which fit the curves of former geodetic observations, as well. The dense data points of the East and Up (vertical) components made possible more detailed geomorphologic interpretations of the ongoing process between two GPS observations. During the investigated periods the deceleration of movements was experienced, however, the deceleration of the dormant state needs the continuation of the monitoring.},
	year = {2023},
	eissn = {1587-3773},
	pages = {992-1000},
	orcid-numbers = {Szűcs, Eszter/0000-0001-6781-4269; Gribovszki, Katalin Eszter/0000-0003-2577-0127}
}

@article{MTMT:34190536,
	title = {HUNGARIAN CONTRIBUTION TO THE RESEARCH ON POSITIONING AND APPLICATIONS (2019-2022) – IAG COMMISSION 4},
	url = {https://m2.mtmt.hu/api/publication/34190536},
	author = {Rózsa, Szabolcs and Ács, Ágnes Mária and Ambrus, Bence and Bányai, László and Békési, Eszter and Bozsó, István and Égető, Csaba and Farkas, Márton and Gönczy, Sándor and Horváth, Roland and Juni, Ildikó and Khaldi, Abir and Lupsic, Balázs and Magyar, Bálint and Nagy, Lajos and Paláncz, Béla and Siki, Zoltán and Somogyi, Rita and Szakács, Alexandru and Szárnya, Csilla and Szűcs, Eszter and Takács, Bence and Tóth, Sándor and Turák, Bence Dávid and Vanek, Bálint and Völgyesi, Lajos and Wesztergom, Viktor},
	journal-iso = {GEOMAT KÖZL},
	journal = {GEOMATIKAI KÖZLEMÉNYEK / PUBLICATIONS IN GEOMATICS},
	volume = {25},
	unique-id = {34190536},
	issn = {1419-6492},
	year = {2022},
	pages = {41-50},
	orcid-numbers = {Rózsa, Szabolcs/0000-0001-5335-6455; Ambrus, Bence/0000-0002-8896-9443; Békési, Eszter/0000-0003-3561-1656; Égető, Csaba/0000-0001-7722-852X; Gönczy, Sándor/0000-0003-0350-0484; Juni, Ildikó/0000-0002-3603-3387; Magyar, Bálint/0000-0002-2464-6805; Siki, Zoltán/0000-0002-9615-181X; Szárnya, Csilla/0000-0002-8880-194X; Szűcs, Eszter/0000-0001-6781-4269; Takács, Bence/0000-0003-4262-7461; Tóth, Sándor/0000-0001-8445-9027; Vanek, Bálint/0000-0002-2458-2725; Völgyesi, Lajos/0000-0002-3196-4887}
}

@misc{MTMT:33220215,
	title = {XII. Geomatika Szeminárium},
	url = {https://m2.mtmt.hu/api/publication/33220215},
	author = {Wesztergom, Viktor and Bányai, László and Papp, Gábor and Benedek, Judit and Gribovszki, Katalin Eszter and Bozsó, István and Porkoláb, Kristóf and Békési, Eszter and Szárnya, Csilla},
	unique-id = {33220215},
	year = {2022},
	orcid-numbers = {Papp, Gábor/0000-0001-6611-4578; Gribovszki, Katalin Eszter/0000-0003-2577-0127; Porkoláb, Kristóf/0000-0001-7470-8296; Békési, Eszter/0000-0003-3561-1656; Szárnya, Csilla/0000-0002-8880-194X}
}

@article{MTMT:31960950,
	title = {Evolution of surface deformation related to salt-extraction-caused sinkholes in Solotvyno (Ukraine) revealed by Sentinel-1 radar interferometry},
	url = {https://m2.mtmt.hu/api/publication/31960950},
	author = {Szűcs, Eszter and Gönczy, Sándor and Bozsó, István and Bányai, László and Szakacs, Alexandru and Szárnya, Csilla and Wesztergom, Viktor},
	doi = {10.5194/nhess-21-977-2021},
	journal-iso = {NAT HAZARD EARTH SYS},
	journal = {NATURAL HAZARDS AND EARTH SYSTEM SCIENCES},
	volume = {21},
	unique-id = {31960950},
	issn = {1561-8633},
	year = {2021},
	eissn = {1684-9981},
	pages = {977-993},
	orcid-numbers = {Szűcs, Eszter/0000-0001-6781-4269; Gönczy, Sándor/0000-0003-0350-0484; Bozsó, István/0000-0001-8254-1828; Bányai, László/0000-0003-2122-0996; Szárnya, Csilla/0000-0002-8880-194X}
}

@article{MTMT:31348863,
	title = {Integration of Sentinel-1 Interferometry and GNSS Networks for Derivation of 3-D Surface Changes},
	url = {https://m2.mtmt.hu/api/publication/31348863},
	author = {Bozsó, István and Bányai, László and Hooper, Andrew and Szűcs, Eszter and Wesztergom, Viktor},
	doi = {10.1109/LGRS.2020.2984917},
	journal-iso = {IEEE GEOSCI REMOTE S},
	journal = {IEEE GEOSCIENCE AND REMOTE SENSING LETTERS},
	volume = {18},
	unique-id = {31348863},
	issn = {1545-598X},
	abstract = {We present a new procedure and program system to integrate Sentinel-1 synthetic aperture radar (SAR) interferometry and Global Navigation Satellite System (GNSS) network observations to estimate 3-D surface changes caused by environmental processes. The procedure is based on the integrated geodetic/geodynamic benchmarks, which are equipped with both ascending (ASC) and descending (DSC) corner reflectors. The results of sparse GNSS observations are interpolated using the ASC and DSC line-of-sight changes provided by the Sentinel-1 mission every six days. The data integration is carried out using a Kalman filter where north, east, and up (vertical) coordinates and their instantaneous velocities are estimated and updated by the GNSS-derived data. The north components are essentially provided by the GNSS observations alone. The procedure was developed and successfully tested on landslide areas in Hungary.},
	keywords = {KALMAN FILTER; InSAR; Global navigation satellite system; Sentinel-1},
	year = {2021},
	eissn = {1558-0571},
	pages = {692-696},
	orcid-numbers = {Szűcs, Eszter/0000-0001-6781-4269}
}

@article{MTMT:31041582,
	title = {Investigation of Integrated Twin Corner Reflectors Designed for 3-D InSAR Applications},
	url = {https://m2.mtmt.hu/api/publication/31041582},
	author = {Bányai, László and Nagy, Lajos and Hooper, Andrew and Bozsó, István and Szűcs, Eszter and Wesztergom, Viktor},
	doi = {10.1109/LGRS.2019.2939675},
	journal-iso = {IEEE GEOSCI REMOTE S},
	journal = {IEEE GEOSCIENCE AND REMOTE SENSING LETTERS},
	volume = {17},
	unique-id = {31041582},
	issn = {1545-598X},
	year = {2020},
	eissn = {1558-0571},
	pages = {1013-1016},
	orcid-numbers = {Szűcs, Eszter/0000-0001-6781-4269}
}

@misc{MTMT:30840189,
	title = {Seismotectonic analysis using GIS and stress inversions in the SE-Carpathians},
	url = {https://m2.mtmt.hu/api/publication/30840189},
	author = {Czirok, Lili and Kuslits, Lukács and Bozsó, István and Gribovszki, Katalin Eszter and Bányai, László},
	unique-id = {30840189},
	year = {2019},
	orcid-numbers = {Gribovszki, Katalin Eszter/0000-0003-2577-0127}
}

@inproceedings{MTMT:30830770,
	title = {Exploitation of Sentinel-1 SAR data for studying geodynamic, tropospheric and ionospheric processes},
	url = {https://m2.mtmt.hu/api/publication/30830770},
	author = {Bozsó, István and Szűcs, Eszter and Bányai, László and Wesztergom, Viktor},
	booktitle = {Proceedings of the 5th International Conference on Research, Technology and Education of Space (H-SPACE 2019)},
	unique-id = {30830770},
	abstract = {Radar images acquired by spaceborne SAR (Synthetic Aperture Radar) instruments have been used extensively by the scientific community for biomass estimation, surface deformation mapping and monitoring, land cover classification, flood mapping in the last twenty years. The availability of SAR scenes, however, was limited until the launch of the Sentinel-1 A and B satellites in 2014 and 2016, that ushered in a new age of SAR remote sensing, thanks to the open access data policy of the Copernicus Earth Observation Program of the EU. Sentinel-1 IWS (Interferometric Wide Swath) SAR acquisitions provide wide area coverage and ensure short revisit times (6 days in Europe, 12+ days outside of Europe). One of the main usages of SAR images is the interferometric processing, that yields so-called interferograms that contain the phase differences between two SAR scenes. The interferometric phase is the combination of different phase terms including surface deformation (if present), atmospheric, ionospheric, topographic, noise. The accurate estimation and separation of these terms allow the analysis of the (geo)physical and geodynamic processes related to the origin of the phase components. We wish to demonstrate that it is possible to separate the aforementioned phase components and use the resulting phase to study geodynamic and atmospheric phenomena such as landslide evolution (with the help of corner reflectors), large scale surface deformation trends in the Transylvanian Basin, change of water vapour content in the atmosphere and ionospheric electron content variations.},
	year = {2019},
	pages = {34-37},
	orcid-numbers = {Szűcs, Eszter/0000-0001-6781-4269}
}

@article{MTMT:30819814,
	title = {Monitoring 3D deformation of radar reflectors with the fusion of Sentinel-1 SAR interferometry and GNSS},
	url = {https://m2.mtmt.hu/api/publication/30819814},
	author = {Bozsó, István and Bányai, László and Szárnya, Csilla and Szűcs, Eszter and Wesztergom, Viktor},
	journal-iso = {GEOPHYS RES ABSTR},
	journal = {GEOPHYSICAL RESEARCH ABSTRACTS},
	volume = {21},
	unique-id = {30819814},
	issn = {1029-7006},
	abstract = {Space-borne radar interferometry (InSAR) is an excellent tool for measuring surface displacements. Using the phase information stored in the SAR images it is possible to calculate the phase difference due to surface movements between two acquisitions and from the differential phase, calculate the surface displacements. This method can be used reliably to create surface deformation time-series for mapping large areas and monitoring single reflecting targets. Some areas, however, are not suitable for InSAR analysis due to heavy vegetation or other factors that decrease phase coherence. In such cases, it is possible to install artificial reflecting objects (radar reflectors) that provide a stable phase over a long period of time. The MTA CSFK Geodetic and Geophysical Institute in collaboration with the Department of Broadband Infocommunications and Electromagnetic Theory of the Budapest University of Technology and Economics under ESA PECS project (project ID: 4000118850/16/NL/SC) developed such artificial reflectors. To overcome the other limitation of InSAR, namely that only deformation that is parallel to the satellite line-of-sight (LOS) can be measured, we have also carried out GNSS measurements at our reflector benchmarks. Three reflector networks were deployed in Hungary, two along the loess banks of River Danube, where landslide activity is frequent and one near Lake Balaton in an area affected by landslides as well. We used Sentinel-1 A and B satellite data between two GNSS campaign measurements (from July of 2016 to March of 2017) to calculate ascending and descending LOS displacements at our reflector benchmarks and through a technique called Kalman-filtering we fused data from ascending and descending satellite passes and the GNSS measurements to calculate the 3D displacements of our reflector networks, relative to a single reference reflector for each network. We present the 3D movements we have calculated with the previously described method at the three reflector networks and comment on the potential error sources and the possible improvements to our methodology.},
	year = {2019},
	eissn = {1607-7962},
	orcid-numbers = {Szárnya, Csilla/0000-0002-8880-194X; Szűcs, Eszter/0000-0001-6781-4269}
}

@{MTMT:30819790,
	title = {A topográfia-dinamika nagyléptékű leképezése: hazai Sentinel-1 radarinterferometriai eredmények},
	url = {https://m2.mtmt.hu/api/publication/30819790},
	author = {Szűcs, Eszter and Bozsó, István and Bányai, László and Szárnya, Csilla and Wesztergom, Viktor},
	booktitle = {A Magyar Űrkutatási Fórum 2019 válogatott közleményei},
	unique-id = {30819790},
	abstract = {A bolygó belső folyamatainak legszembetűnőbb és közvetlenül tapasztalható megnyilvánulása a topográfia-dinamika. Az ESA Sentinel-1 földmegfigyelő programja egyedülálló lehetőséget ad a felszíni folyamatok nagypontosságú, finom felbontású leképezésére mindezt nagy időbeli
		felbontással párosítva. A nagy időállandójú tektonikai folyamatok, infrastruktúra deformációk
		néhány mm/év nagyságrendű sebességgel jellemezhetők, ezek detektálására a módszer alkalmas, a korlátot a hullámterjedés okozta jelkésleltetés kvantitatív ismeretének hiánya jelenti, ami kiemelt jelentőséggel bír regionális léptékű folyamatok vizsgálatában.},
	year = {2019},
	pages = {69-72},
	orcid-numbers = {Szűcs, Eszter/0000-0001-6781-4269; Szárnya, Csilla/0000-0002-8880-194X}
}