Yazar "Yalvac, Sefa" için listeleme
-
Anatomy of October 30, 2020, Samos (Sisam)-Kuqadasi earthquake (MW 6.92) and its influence on Aegean earthquake hazard
Bulut, Fatih; Dogru, Asli; Yaltirak, Cenk; Yalvac, Sefa; Elge, Murat (Scientific Technical Research Council Turkey-Tubitak, 2021)We investigated rupture geometry, size, and slip distribution of October 30, 2020, Samos (Sisam)-Kusadasi earthquake combining seismographs, GPS measurements, and SAR analysis. Right after the earthquake, we measured 13 ... -
Detecting and Removing Repetitive Errors from PPP Time Series by Means of Adaptive Filter
Yalvac, Sefa; Ustun, Aydin; Berber, Mike Mustafa (IEEE, 2017)PPP (Precise Point Positioning) is a relatively new GNSS (Global Navigation Satellite System) method that enables position determinations using a single receiver. Being able to survey with a single receiver makes this ... -
Investigating the historical development of accuracy and precision of Galileo by means of relative GNSS analysis technique
Yalvac, Sefa (Springer Heidelberg, 2021)Galileo navigation system has significantly expanded satellite constellation over the last few years and now serves with 22 satellites in three orbital planes. The development of the Galileo is not only limited to the ... -
Land Subsidence and Its Relations with Sinkhole Activity in Karapinar Region, Turkey: A Multi-Sensor InSAR Time Series Study
Orhan, Osman; Oliver-Cabrera, Talib; Wdowinski, Shimon; Yalvac, Sefa; Yakar, Murat (Mdpi, 2021)The Karapinar basin, located in the Central Anatolian part of Turkey, is subjected to land subsidence and sinkhole activity due to extensive groundwater withdrawal that began in the early 2000s. In this study, we use ... -
Multipath interference cancelation in GPS time series under changing physical conditions by means of adaptive filtering
Ustun, Aydin; Yalvac, Sefa (Springer Heidelberg, 2018)Multipath, a highly autocorrelated signal is observable phenomena during time periods longer than the sidereal period of Global Positioning System (GPS) satellites in their constellations. Multipath pattern and sidereal ... -
Seismic Disturbances and Geodetic Effects: Unraveling the Impact of the Mw = 6.2 Petrinja Earthquake on the Croatian Positioning System CROPOS
Bjelotomić Oršulić, Olga; Varga, Matej; Yalvac, Sefa (Multidisciplinary Digital Publishing Institute (MDPI), 2024)A destructive Mw = 6.2 earthquake struck NW Croatia on 29 December 2020, ranking among the most hazardous events in the country in the last century. This study assesses the impact of the earthquake on the permanent geodetic ... -
Validating InSAR-SBAS results by means of different GNSS analysis techniques in medium- and high-grade deformation areas
Yalvac, Sefa (Springer, 2020)This study aimed to validate the interferometric synthetic aperture radar (InSAR) method by using relative and absolute Global Navigation Satellite System (GNSS) techniques. In this context, two land subsidence areas, one ...
