Richard Ray (NASA GSFC, USA); Frank Lemoine (NASa GSFC, USA); Nikita Zelensky (University of Maryland, USA); Xu Yang (KBR Inc. NASA GSFC, USA); Gary Mitchum (University of South Florida, USA); Doug Vandemark (University of New Hampshire, USA); Hui Feng (University of New Hampshire, USA); Bryant Loomis (NASA GSFC, USA); Michael Croteau (NASA GSFC, USA)

The recent launch of Sentinel-6 Michael Freilich offers the possibility of continuing global mean sea level (GMSL) monitoring well into the current decade. In this presentation we report Sentinel-6/Jason-3 inter-mission bias estimates based on direct sea surface height (SSH) collinear differences of near coincident measurements during the verification phase, and with comparisons to a global network of tide gauges. In an effort to provide a more consistent SSH time series and seamless transition to Sentinel-6, we have generated orbits for the entire time span based on the revised ITRF2020 terrestrial reference frame. We report the efficacy of correction algorithm revisions leading to the development of the NASA MEaSURE’s V6.0 sea surface height Climate Data Record (MEaSUREs - Integrated Multi-Mission Ocean Altimeter Data for Climate Research (MEaSUREs-SSH) | PO.DAAC / JPL / NASA ).
We provide an assessment of recent improvements to the accuracy of the 30+ year sea surface height time series, describe continuing calibration/validation activities, and evaluate the subsequent impact on current global mean sea level estimates, and the accounting of the ocean mass budget.