Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Assessment of degree-2 order-1 gravitational changes from GRACE and GRACE Follow-on, Earth rotation, satellite laser ranging, and models
https://orcid.org/0000-0001-5405-8441
Abstract We carry out a comprehensive analysis and assessment of degree-2 gravitational changes $ ΔC_{21} $, and $ ΔS_{21} $, estimated using the Gravity Recovery and Climate Experiment (GRACE) and GRACE Follow-On (GFO), satellite laser ranging (SLR), Earth Orientation Parameters (EOP), and geophysical models over the period April 2002–February 2020. The four independent estimates of $ ΔC_{21} $ and $ ΔS_{21} $ variations agree well over a broad band of frequencies. The GRACE/GFO Release 6 (RL06) solutions show major improvements over the previous RL05 solutions at both seasonal and intra-seasonal time scales, when compared with EOP and SLR estimates. Among the four independent estimates, highest correlation coefficients and smallest RMS residuals are found between GRACE/GFO and EOP estimates of $ ΔC_{21} $ and $ ΔS_{21} $ variations. GRACE/GFO and EOP $ ΔC_{21} $ and $ ΔS_{21} $ estimates exhibit slightly different trends, which are related to the implementation and interpretation of the pole tide correction in GRACE/GFO data processing. This study provides an important early validation of GFO $ ΔC_{21} $ and $ ΔS_{21} $ solutions, especially the new pole tide correction applied in GRACE/GFO RL06 solutions using independent estimates.
Assessment of degree-2 order-1 gravitational changes from GRACE and GRACE Follow-on, Earth rotation, satellite laser ranging, and models
https://orcid.org/0000-0001-5405-8441
Abstract We carry out a comprehensive analysis and assessment of degree-2 gravitational changes $ ΔC_{21} $, and $ ΔS_{21} $, estimated using the Gravity Recovery and Climate Experiment (GRACE) and GRACE Follow-On (GFO), satellite laser ranging (SLR), Earth Orientation Parameters (EOP), and geophysical models over the period April 2002–February 2020. The four independent estimates of $ ΔC_{21} $ and $ ΔS_{21} $ variations agree well over a broad band of frequencies. The GRACE/GFO Release 6 (RL06) solutions show major improvements over the previous RL05 solutions at both seasonal and intra-seasonal time scales, when compared with EOP and SLR estimates. Among the four independent estimates, highest correlation coefficients and smallest RMS residuals are found between GRACE/GFO and EOP estimates of $ ΔC_{21} $ and $ ΔS_{21} $ variations. GRACE/GFO and EOP $ ΔC_{21} $ and $ ΔS_{21} $ estimates exhibit slightly different trends, which are related to the implementation and interpretation of the pole tide correction in GRACE/GFO data processing. This study provides an important early validation of GFO $ ΔC_{21} $ and $ ΔS_{21} $ solutions, especially the new pole tide correction applied in GRACE/GFO RL06 solutions using independent estimates.
Assessment of degree-2 order-1 gravitational changes from GRACE and GRACE Follow-on, Earth rotation, satellite laser ranging, and models
https://orcid.org/0000-0001-5405-8441
Abstract We carry out a comprehensive analysis and assessment of degree-2 gravitational changes $ ΔC_{21} $, and $ ΔS_{21} $, estimated using the Gravity Recovery and Climate Experiment (GRACE) and GRACE Follow-On (GFO), satellite laser ranging (SLR), Earth Orientation Parameters (EOP), and geophysical models over the period April 2002–February 2020. The four independent estimates of $ ΔC_{21} $ and $ ΔS_{21} $ variations agree well over a broad band of frequencies. The GRACE/GFO Release 6 (RL06) solutions show major improvements over the previous RL05 solutions at both seasonal and intra-seasonal time scales, when compared with EOP and SLR estimates. Among the four independent estimates, highest correlation coefficients and smallest RMS residuals are found between GRACE/GFO and EOP estimates of $ ΔC_{21} $ and $ ΔS_{21} $ variations. GRACE/GFO and EOP $ ΔC_{21} $ and $ ΔS_{21} $ estimates exhibit slightly different trends, which are related to the implementation and interpretation of the pole tide correction in GRACE/GFO data processing. This study provides an important early validation of GFO $ ΔC_{21} $ and $ ΔS_{21} $ solutions, especially the new pole tide correction applied in GRACE/GFO RL06 solutions using independent estimates.
Assessment of degree-2 order-1 gravitational changes from GRACE and GRACE Follow-on, Earth rotation, satellite laser ranging, and models
Chen, Jianli (Autor:in) / Ries, John C. (Autor:in) / Tapley, Byron D. (Autor:in)
Journal of Geodesy ; 95
2021
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
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