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Article

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

Institute of Geodesy and Cartography, Centre of Geodesy and Geodynamics, 27 Modzelewskiego St., 02-679 Warsaw, Poland
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Remote Sens. 2020, 12(20), 3359; https://doi.org/10.3390/rs12203359
Received: 19 August 2020 / Revised: 25 September 2020 / Accepted: 13 October 2020 / Published: 15 October 2020
(This article belongs to the Special Issue Terrestrial Hydrology Using GRACE and GRACE-FO)
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. View Full-Text
Keywords: equivalent water thickness; GNSS; GRACE/GRACE-FO; temporal mass variations within the Earth’s system; vertical surface deformation equivalent water thickness; GNSS; GRACE/GRACE-FO; temporal mass variations within the Earth’s system; vertical surface deformation
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MDPI and ACS Style

Godah, W.; Ray, J.D.; Szelachowska, M.; Krynski, J. The Use of National CORS Networks for Determining Temporal Mass Variations within the Earth’s System and for Improving GRACE/GRACE-FO Solutions. Remote Sens. 2020, 12, 3359. https://doi.org/10.3390/rs12203359

AMA Style

Godah W, Ray JD, Szelachowska M, Krynski J. The Use of National CORS Networks for Determining Temporal Mass Variations within the Earth’s System and for Improving GRACE/GRACE-FO Solutions. Remote Sensing. 2020; 12(20):3359. https://doi.org/10.3390/rs12203359

Chicago/Turabian Style

Godah, Walyeldeen, Jagat D. Ray, Malgorzata Szelachowska, and Jan Krynski. 2020. "The Use of National CORS Networks for Determining Temporal Mass Variations within the Earth’s System and for Improving GRACE/GRACE-FO Solutions" Remote Sensing 12, no. 20: 3359. https://doi.org/10.3390/rs12203359

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