Comparing variance of signal contained in the most recent GRACE solutions

• Autorzy: Lenczuk Artur , Leszczuk Grzegorz , Klos Anna , Bogusz Janusz

Identyfikatory

DOI

10.24425/gac.2020.131084

• Języki publikacji: EN

Abstrakty

EN

Gravity Recovery and Climate Experiment (GRACE) mission data is widely used in various fields of science. GRACE explored changes of the gravity field regularly from April 2002 to June 2017. In the following research, we examine variance of signal contained in two different formats of GRACE data: standard spherical harmonics and mass concentration blocks (so-called “mascons”) solutions, both provided in the most recent releases. For spherical harmonics-based solution, we use monthly gravity field solutions provided up to degree and order (d/o) 96 by three different computing centers, i.e. the NASA’s Jet Propulsion Laboratory (JPL), the German Research Center for Geosciences (GFZ) and the Center for Space Research (CSR). For the mass concentration blocks, we use values of total water storage provided by the CSR, JPL and the Goddard Space Flight Center (GSFC) computing centers, which we convert to spherical harmonic coefficients up to d/o 96. We show that using the anisotropic DDK3 filter to smooth the north-south stripes present in total wate storage obtained from standard spherical harmonics solution leaves more information than common isotropic Gaussian filter. In the case of mascons, GSFC solution contains much more information than the CSR and JPL releases, relevant for corresponding d/o. Differences in variance of signal arise from different background models as well as various shape and size of mascons used during processing of GRACE observations.

Słowa kluczowe

EN

GRACE; degree variance; spherical harmonic coefficients; mass concentration blocks

PL

misja GRACE; pole grawitacyjne; harmoniki sferyczne

• Wydawca: Komitet Geodezji PAN
• Czasopismo: Geodesy and Cartography
• Rocznik: 2020
• Tom: Vol. 69, no. 1
• Strony: 19--37
• Opis fizyczny: Bibliogr. 52 poz., rys., tab., wykr.

Twórcy

autor

Lenczuk Artur

• Faculty of Civil Engineering and Geodesy, Military University of Technology, Warsaw, Poland

autor

Leszczuk Grzegorz

• Faculty of Civil Engineering and Geodesy, Military University of Technology, Warsaw, Poland

autor

Klos Anna

• Faculty of Civil Engineering and Geodesy, Military University of Technology, Warsaw, Poland

autor

Bogusz Janusz

• Faculty of Civil Engineering and Geodesy, Military University of Technology, Warsaw, Poland

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