Review
Open access
CSR GRACE and GRACE-FO Level-2/-3 Overview
H. Save
Chao-Yang Zhang
B. Tapley
S. Bettadpur
Nicholas A. Childress
M. Tamisiea
P. Nagel
N. Pie
B. Krichman
G. Jacob
Z. Kang
S. Poole
J. Ries
Abstract
We present the GRACE and GRACE-FO Level-2 and Level-3 products generated at CSR, evaluating their quality using standard metrics. We also report on the RL07 reprocessing of GRACE and GRACE-FO data, which incorporates updated Level-1B observations, reference frames, background models, instrument calibrations, and processing strategies. New CSR mascon solutions are being developed within the same RL07 framework. The RL07 solutions reduce the RMS of the noise over the ocean by more than 35% compared to RL06.3, improving solution stability and the effective spatial resolution of mass-change estimates.