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Regularization : These mascon solutions are computed in presence of regularization constraint which is derived purely from GRACE information. 1.0. For more expert users who wish to do their own separation of land and ocean mass signals, a version of the data without the CRI filter implemented is available. Mascon solutions, one of the recent advances in Gravity Recovery and Climate Experiment (GRACE) products, are being widely used due to their significant improvement in spatial accuracy and their ability to be directly employed without post-processing. This work was supported by the NASA MEaSUREs Program. Colorado Center for Astrodynamics Research 2018. This results in better S/N See the provider's Monthly Mass Grids Overview for ... NASA/GRACE/MASS_GRIDS/MASCON, Res., V118, 1-8, doi:10.1002/jgrb.50058, 2013. 1-sigma uncertainty for each 3-degree mascon estimate. The coefficients are independent of the GRACE/GRACE-FO data proper, hence they are provided as a separate file. Please check the FAQs regarding questions about the time-mean field. eq water height globally. Over land and ice the mascons primarily describe the total variability in water content, and over the ocean we provide separate solutions for ocean bottom pressure and sea level anomalies. [Update 2017-10-24]: The Land and Ocean girds that accompany the CSR Mascon solutions (v01) are now available for download below in NetCDF format. For comparisons against other data or models, it is critical that anomalies relative to the same time-average are compared. Please review the About and The users should not apply any additional filtering or scaling factors to these solutions. Tikhonov regularization is used along with L-ribbon approach to compute the regularization parameter. However, mascon solution cannot fully recover the complete seismic deformation since it is still a spatially “band‐limited” data set that uses the spatial smoothing in the aggressive regularization.

We here use GRACE mascon solutions to investigate the coastal ocean mass variations (within 400 km band) at global and regional scales. supported by the NASA MEaSUREs Program." Also, the gain factors are suitable for application to the CRI-filtered version of the data for mascons that span coastlines. Physics, Astrophysics and Astronomy, Perspectives of Earth and Space Scientists, I have read and accept the Wiley Online Library Terms and Conditions of Use, Journal of Geophysical Research: Solid Earth, http://www2.csr.utexas.edu/grace/RL05_mascons.html, http://www2.csr.utexas.edu/grace/RL05.html, http://www.tectonics.caltech.edu/slip_history/2010_chile/index.html. The mascon solutions have strengthened gravity change signals of approximately twice the strength of the SH solutions. The grids have 720 longitude points (0.25, 0.75, 1.25, ..., 359.75), and 360 latitude points (-89.75, -89.25, ..., 89.25, 89.75).

Chinn (2006), Recent Greenland Ice Mass Loss by Drainage System from Satellite Gravity Observations. We have developed and applied a Coastline Resolution Improvement (CRI) filter (more details provided below) to separate the land and ocean portions of mass within each land/ocean mascon in a post-processing step. Int., 192, 557–572, doi: 10.1093/gji/ggs030. Oceanography, Interplanetary Processes, Information Physics, Solar In this study, we examine the performance of the mascon solutions for seismic gravity signals induced by three M9 class (2011 Tohoku‐Oki, 2004 Sumatra, and 2010 Chile) and three smaller earthquakes and compare them with SH solutions and theoretical gravity changes modeled according to the dislocation theory. Another key point is that GRACE-based TWS data cannot be directly compared with GPS data, and GRACE SH or GRACE gridded products (Tellus and mascon) must be processed and converted to loading displacements based on elastic loading theory (Farrell, 1972). Swenson S.C , D. P. Chambers, and J. Wahr: Estimating geocenter variations from a combination of GRACE and ocean model output. 3°x3° spherical cap mass concentration (mascon) functions to minimize the two solutions. Level-3 Data Products Similar to the derivation of the gain factors for the spherical harmonic solutions (see Landerer et al., 2012), we use the CLM hydrology model at 0.5 degree resolution, and “mascon average” this, then do a least-squares fit to the “mascon-averaged” hydrology model and the original data. A, G., J. Wahr, and S. Zhong (2013) "Computations of the viscoelastic response of a 3-D compressible Earth to surface loading: an application to Glacial Isostatic Adjustment in Antarctica and Canada", Geophys. Sabaka, T. J., D. D. Rowlands, S. B. Luthcke, and J. P. Boy (2010), Improving global mass flux solutions from GRACE through forward modeling and continuous time-correlation. D. N. Wiese, D.-N. Yuan, C. Boening, F. W. Landerer, M. M. Watkins. The C20 time series from SLR is available at ftp://podaac.jpl.nasa.gov/allData/grace/docs/TN-07_C20_SLR.txt. each solution and information about getting started with the Luthcke, S.B., T.J. Sabaka, B.D. The GRACE Tellus (GRCTellus) Global Mascon dataset is based on Level-1 GRACE observations and processed at NASA Jet Propulsion Laboratory (JPL). |  FLIGHT SYSTEMS   Save, H., S. Bettadpur, and B.D. The provided estimates of uncertainty are regarded to be conservative. It has been designed to provide an easy way for users to explore both datasets and compare the two solutions. https://doi.org/10.1029/2020GL088306. GRACE Mission The Gravity Recovery and Climate Experiment (GRACE) and GRACE Follow-On are dual-satellite missions monitoring and mapping Earth's changing gravity field. Glac. Monitoring changes in ice sheets and glaciers, underground water storage, the amount of water in large lakes and rivers, and changes in sea level provides a unique view of Earth’s climate and has far-reaching benefits for its people.

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