NASA's Physical Oceanography Distributed Active Archive Center (PO.DAAC) released the NASA-SSH Sea Surface Height from Standardized Reference Missions Only Version 1 datasets produced by NASA. Two distinct datasets are released. The datasets are produced from observations of sea surface height from the radar altimeter satellites in the reference mission orbits, including TOPEX/Poseidon, the Jason series, and Sentinel-6. All missions have been referenced to a common baseline, additional quality control has been performed, and errors with wavelengths around one orbital cycle have been reduced. Learn more about NASA-SSH.
The two datasets are: the Along-Track Sea Surface Height and Simple Gridded Sea Surface Height. The datasets both cover the global ocean up to the most poleward extent of the reference mission orbits. The data begin in October 1992 and continue through the present. The Along-Track Sea Surface Height dataset provides along-track observations of sea surface height, collected approximately once per second (1 Hz) and parsed into daily files. The Simple Gridded Sea Surface Height dataset provides 2D maps of sea surface height anomaly once every 7 days. These grids are produced on a 0.5-degree latitude and longitude grid, and consist of 10 days worth of observations, which cover approximately 1 complete repeat cycle of observations from the reference missions. Files for both the Along-Track and Simple Gridded datasets are distributed in netCDF4 format.
The datasets are described and discoverable via the Earthdata catalog.
If you have questions, please contact PO.DAAC user services or visit PO.DAAC on Earthdata Forum.