NDLI: The Use of National CORS Networks for Determining Temporal Mass Variations within the Earth's System and for Improving GRACE/GRACE-FO Solutions

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The Use of National CORS Networks for Determining Temporal Mass Variations within the Earth's System and for Improving GRACE/GRACE-FO Solutions

Content Provider	MDPI
Author	Godah, Walyeldeen Ray, Jagat Szelachowska, Malgorzata Krynski, Jan
Copyright Year	2020
Description	Temporal mass variations within the Earth’s system can be detected on a regional/global scale using GRACE (Gravity Recovery and Climate Experiment) and GRACE Follow-On (GRACE-FO) satellite missions’ data, while GNSS (Global Navigation Satellite System) data can be used to detect those variations on a local scale. The aim of this study is to investigate the usefulness of national GNSS CORS (Continuously Operating Reference Stations) networks for the determination of those temporal mass variations and for improving GRACE/GRACE-FO solutions. The area of Poland was chosen as a study area. Temporal variations of equivalent water thickness ΔEWT and vertical deformations of the Earth’s surface Δh were determined at the sites of the ASG-EUPOS (Active Geodetic Network of the European Position Determination System) CORS network using GRACE/GRACE-FO-based GGMs and GNSS data. Moreover, combined solutions of ΔEWT were developed by combining ΔEWT obtained from GNSS data with the corresponding ones determined from GRACE satellite mission data. Strong correlations (correlation coefficients ranging from 0.6 to 0.9) between detrended Δh determined from GRACE/GRACE-FO satellite mission data and the corresponding ones from GNSS data were observed at 93% of the GNSS stations investigated. Furthermore, for the determination of temporal mass variations, GNSS data from CORS network stations provide valuable information complementary to GRACE satellite mission data.
Starting Page	3359
e-ISSN	20724292
DOI	10.3390/rs12203359
Journal	Remote Sensing
Issue Number	20
Volume Number	12
Language	English
Publisher	MDPI
Publisher Date	2020-10-15
Access Restriction	Open
Subject Keyword	Remote Sensing Equivalent Water Thickness Gnss Grace/grace-fo Temporal Mass Variations Within the Earth's System Vertical Surface Deformation
Content Type	Text
Resource Type	Article

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