Assessment of Revised TOPEX/Jason Global and Regional Mean Sea Level Estimates Referenced to ITRF2014

Brian Beckley (SGT Inc./NASA GSFC, United States)


Frank Lemoine (NASA/GSFC, USA); Nikita Zelensky (SGT Inc., USA); Bryant Loomis (NASA GSFC, USA); Richard Ray (NASA GSFS, USA); Gary Mitchum (University of South Florida, USA); Xu Yang (SGT Inc., USA)

Event: 2017 Ocean Surface Topography Science Team Meeting

Session: Regional and Global CAL/VAL for Assembling a Climate Data Record

Presentation type: Type Poster

The terrestrial reference frame is the foundation for analysis and interpretation of Earth science observations, especially for data from ocean radar altimeter satellites. The accuracy of the coordinates as well as the consistency of the technique solutions within an ITRF affect the accuracy with which orbits are computed, and map into the accuracy of the altimeter derived estimates of global mean sea level (GMSL). The recent launch of Jason-3 offers the possibility of continuing GMSL monitoring well into the next decade. In an effort to provide a consistent TOPEX/Jason altimeter sea surface height (SSH) time series and seamless transition to Jason-3, we have generated orbits for the entire time span based on the revised ITRF2014 terrestrial reference frame. We report the efficacy of the revised terrestrial reference frame towards improving precise orbit determinations leading to the development of the NASA MEaSURE’s V4.0 revised sea surface height Climate Data Record ( We provide an assessment of recent improvements to the accuracy of the 25-year SSH time series via mass budget closure and tide gauge comparisons, describe continuing calibration/validation activities, and evaluate the subsequent impact on current global and regional mean sea level estimates.


Poster show times:

RoomStart DateEnd Date
Concerto Ballroom Thu, Oct 26 2017,14:00 Thu, Oct 26 2017,18:00
Brian Beckley
United States