'Time Variable Earth Gravity Field Models From the First Spaceborne Laser Ranging Interferometer'

Autor: David N. Wiese, Nadege Pie, Mark E. Tamisiea, Dah-Ning Yuan, S. V. Bettadpur, Felix W. Landerer, Peter Nagel, S. R. Poole, C. McCullough, Matthias Ellmer, Zhigui Kang, G. Jacob, B. Krichman, E. Fahnestock, Himanshu Save
Rok vydání: 2021
Předmět:
Zdroj: Journal of Geophysical Research: Solid Earth. 126
ISSN: 2169-9356
2169-9313
Popis: The Gravity Recovery and Climate Experiment Follow-On (GRACE-FO), launched May 22, 2018 and collecting science data since June 2018, is extending the 15-year data record of Earth mass change established by its predecessor GRACE mission (2002-2017). The GRACE-FO satellites carry onboard a novel technology demonstration instrument for intersatellite ranging, the Laser Ranging Interferometer (LRI), in addition to the microwave interferometer (MWI) carried on GRACE. The LRI has out-performed its in-orbit performance requirements both in terms of accuracy as well as the duration of tracking. Here, we compare and validate LRI-based gravity solutions for January 2019 to September 2020 against the MWI solutions. The comparison between the two sets of gravity solutions shows great similarities in general and nearly perfect consistency at a large hydrologic basin spatial scale (100,000 km
Databáze: OpenAIRE
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