About
19
Publications
1,709
Reads
How we measure 'reads'
A 'read' is counted each time someone views a publication summary (such as the title, abstract, and list of authors), clicks on a figure, or views or downloads the full-text. Learn more
13
Citations
Introduction
GRACE-EWT Time Series Analysis
Skills and Expertise
Education
February 2019 - July 2024
September 2016 - December 2018
September 2012 - June 2016
Publications
Publications (19)
Since April 2002, Gravity Recovery and Climate Experiment (GRACE) and GRACE-FO (FollowOn) satellite gravimetry missions have provided precious data for monitoring mass variations within the hydrosphere, cryosphere, and oceans with unprecedented accuracy and resolution. However, the long-term products of mass variations prior to GRACE-era may allow...
The power function of \(F-\) distribution is the complementary cumulative distribution function of the non-central \(F-\) distribution. It is used to evaluate the power of the test based on the \(F\) or \({\chi }^{2}-\) distributed statistics. This paper revisits its computation and solution for the non-centrality parameter in geodetic studies and...
Bu çalışmada internet tabanlı bağıl konumlama GNSS veri değerlendirme servislerinin kullanımının IGS ağında koordinat değerleri açısından istatistiksel olarak karşılaştırılması amaçlanmıştır. Bu amaçla, 29 Temmuz 2021’de Alaska’da Mw=8.2 büyüklüğünde gerçekleşen deprem ele alınmıştır. Depremin meydana geldiği Alaska-Aleut bölgesinde yer alan 8 IGS...
GRACE uydu sistemi 2002’den beri toplam su bütçesi değişimlerinin küresel ölçekte izlenmesine olanak sağlamaktadır. Eşdeğer su kütlesi değişimi cinsinden ifade edilen toplam su bütçesi zaman serilerinin analizinde trend ve mevsimsel sinyalleri içeren fonksiyonel model olan harmonik regresyon yaklaşımı kullanılır. Bu modelde gözlemlerin eşit ağırlık...
Hydrogeodesy is an applied scientific field that uses precise geodetic observations to measure or infer hydrological quantities and their changes over time. Recently, modern geodesy supplies hydrology with a very powerful tools based on the Earth’s artificial satellites, notably GRACE (Gravity Recovery and Climate Experiment) and GNSS (Global Navig...
This study examines hydrological trend estimations derived from GRACE (Gravity Recovery and Climate Experiment) mascon solutions at the GSFC (Goddard Space Flight Center) in terms of the Equivalent Water Thicknesses (EWT) for the world's major river basins. The estimation of hydrological trends in mascon time series involves two steps: deterministi...
The Gravity Recovery and Climate Experiment (GRACE) mission, along with its successor GRACE Follow-On mission, have been providing continuous monitoring of hydrological changes over time since 2002. Components of the terrestrial hydrosphere, such as groundwater, surface water, or water contained in snow and glaciers, sum up to the Total Water Stora...
This study discusses how to model the noise in a Gravity Recovery and Climate Experiment (GRACE)-Mascon derived Equivalent Water Thicknesses (EWT) time-series. GRACE has provided unique information for monitoring variations in EWT of continents in regional or basin scale since 2002. To analyze a GRACE EWT time-series, a standard harmonic regression...
Monitored displacements/velocities consist of "rigid body displacement" and "deformation". The rigid body part (rotation and translation) depends on the reference frame with which the coordinates are defined whereas the deformation part is independent from the frame definition. GPS Precise Point Positioning (PPP) has been important in positioning s...
The goal of this paper is to compare academic and online GNSS processing services for CORS-TR. To determine whether differences in the coordinate components were statistically significant, statistical significance test and 3D coordinate transformation were applied. Furthermore, local coordinates analysed to show jumps that occurred to seismic event...
Özet:
Bu çalışma, Türkiye’de seçilen havzalara ilişkin 2003-2016 yılları arasındaki GSFC GRACE (Gravity Recovery And Climate Experiment)-Mascon çözümlerinden elde edilen eşdeğer su kalınlığı (EWT) değişimlerini incelemektedir. GRACE, 2002’den beri su kütlesi değişimlerinin izlenmesine olanak sağlamaktadır. GRACE çözümlerinden elde edilen EWT değişi...
This study investigates the effect of stochastic model errors on the significance test for velocities in the analysis of a global positioning system (GPS) position time series. This effect is studied by considering the estimated probabilities of type I and type II errors occurring in the hypothesis testing. For this purpose, synthetic daily time se...
GRACE (Gravity Recovery and Climate Experiment) satellite system, operated by NASA and DLR, has provided high-resolution information (up to 150 km) about the static and dynamic structure of the Earth's gravity field between 2002 and 2016. The GRACE mission, especially known for its sensitivity to the hydrological events and their temporal changes,...
This contribution investigates the EWT temporal variations from GSFC GRACE-Mascon solutions associated with the ice mass in Greenland and Antarctica between 2003 and 2016. This type of variation in spatial and spectral domain is one of the best indicator for the ice loss in these ice-sheets. This study aims to investigate whether the ice loss in ea...
