DOI: 10.6084/m9.figshare.7388540
title: Geocenter Estimates from Time-Variable Gravity and Ocean Model Outputs

description: <strong>Last Updated: 2023-03-03</strong> <br> <strong>File descriptions:</strong> <br> <em>CSR_RL06_MPIOM_SLF_iter.txt</em> Monthly geocenter estimate calculating using a self-consistent, iterated geocenter solutions incorporating self-attraction and loading effects. Calculated using GRACE/GRACE-FO Release-6 time-variable gravity fields from the University of Texas Center for Space Research (CSR) and outputs from the MPIOM ocean model. Glacial Isostatic Adjustment (GIA) estimates from A et al. (2013) with ICE-6G ice history have been restored. <br> <em>CSR_RL06_MPIOM_SLF_iter_wAOD.txt</em> Monthly geocenter estimate calculating using a self-consistent, iterated geocenter solutions incorporating self-attraction and loading effects. Calculated using GRACE/GRACE-FO Release-6 time-variable gravity fields from the University of Texas Center for Space Research (CSR) and outputs from the MPIOM ocean model. Release-6 atmospheric and oceanic de-aliasing (AOD) product has been restored. Glacial Isostatic Adjustment (GIA) estimates from A et al. (2013) with ICE-6G ice history have been restored. <br> <em>GFZ_RL06_MPIOM_SLF_iter.txt</em> Monthly geocenter estimate calculating using a self-consistent, iterated geocenter solutions incorporating self-attraction and loading effects. Calculated using GRACE/GRACE-FO Release-6 time-variable gravity fields from the German Center for Geosciences (GeoForschungsZentrum, GFZ) and outputs from the MPIOM ocean model. Glacial Isostatic Adjustment (GIA) estimates from A et al. (2013) with ICE-6G ice history have been restored. <br> <em>GFZ_RL06_MPIOM_SLF_iter_wSLR21_wSLR22.txt</em> Monthly geocenter estimate calculating using a self-consistent, iterated geocenter solutions incorporating self-attraction and loading effects. Calculated using GRACE/GRACE-FO Release-6 time-variable gravity fields from the German Center for Geosciences (GeoForschungsZentrum, GFZ) and outputs from the MPIOM ocean model. GRACE/GRACE-FO derived figure axis harmonics (C<sub>2,1 </sub>and S<sub>2,1</sub>) and azimuthal dependence harmonics (C<sub>2,2 </sub>and S<sub>2,2</sub>) were replaced with values from Satellite Laser Ranging (SLR) provided by Bryant Loomis at NASA Goddard Space Flight Center (GSFC). Glacial Isostatic Adjustment (GIA) estimates from A et al. (2013) with ICE-6G ice history have been restored. <br> <em>GFZ_RL06_MPIOM_SLF_iter_wAOD.txt</em> Monthly geocenter estimate calculating using a self-consistent, iterated geocenter solutions incorporating self-attraction and loading effects. Calculated using GRACE/GRACE-FO Release-6 time-variable gravity fields from the German Center for Geosciences (GeoForschungsZentrum, GFZ) and outputs from the MPIOM ocean model. Release-5 atmospheric and oceanic de-aliasing (AOD) product has been restored. Glacial Isostatic Adjustment (GIA) estimates from A et al. (2013) with ICE-6G ice history have been restored. <br> <em>JPL_RL06_MPIOM_SLF_iter.txt</em> Monthly geocenter estimate calculating using a self-consistent, iterated geocenter solutions incorporating self-attraction and loading effects. Calculated using GRACE/GRACE-FO Release-6 time-variable gravity fields from the Jet Propulsion Laboratory (JPL) and outputs from the MPIOM ocean model. Glacial Isostatic Adjustment (GIA) estimates from A et al. (2013) with ICE-6G ice history have been restored. <br> <em>JPL_RL06_MPIOM_SLF_iter_wAOD.txt</em> Monthly geocenter estimate calculating using a self-consistent, iterated geocenter solutions incorporating self-attraction and loading effects. Calculated using GRACE/GRACE-FO Release-6 time-variable gravity fields from the Jet Propulsion Laboratory (JPL) and outputs from the MPIOM ocean model. Release-6 atmospheric and oceanic de-aliasing (AOD) product has been restored. Glacial Isostatic Adjustment (GIA) estimates from A et al. (2013) with ICE-6G ice history have been restored. <br> <br> <strong>Data Descriptions:</strong> Data format: (f11.4,3e20.12,i4) <br> <strong>Data columns:</strong> mid-epoch_time: mid-date of each measurement epoch in decimal-years C10: fully normalized cosine coefficient for degree 1 and order 0 C11: fully normalized cosine coefficient for degree 1 and order 1 S11: fully normalized sine coefficient for degree 1 and order 1 month: GRACE/GRACE-FO month of each measurement epoch (months starting 2002-01-01) <br> <br> <strong>Reference:</strong> T. C. Sutterley and I. Velicogna. Improved Estimates of Geocenter Variability from Time-Variable Gravity and Ocean Model Outputs. <em>Remote Sensing</em>, 11(2108), 2019. <br> <strong>Disclaimer:</strong> This data provided here is not sponsored or maintained by the Universities Space Research Association (USRA), the Center for Space Research (UTCSR), the Jet Propulsion Laboratory (JPL), the German Research Centre for Geosciences (GeoForschungsZentrum, GFZ) or NASA. It is provided here under a Creative Commons 4.0 license but with no guarantees whatsoever.