The Ocean Surface Topography Mission (OSTM)/Jason-2 was a follow-on altimetric mission to the TOPEX/Poseidon mission and Jason-1. It was a joint mission between NASA and the Centre national d'études spatiales (CNES), the French space agency.

OSTM measured significant wave height, sigma naught (sigma0), dry and wet troposphere, and ionosphere, which can be used to calculate sea surface height and anomalies and total electron content. OSTM had a repeat period of approximately 10 days with 254 passes per cycle. See lists of cycle start times, maneuvers performed to maintain orbit, safe holds, and periods of no data collection in the "Documentation" tab.

After more than 11 years in orbit, OSTM/Jason-2 permanently ceased acquisition of scientific data on October 1, 2019, due to aging-related issues onboard the spacecraft. Approximately 3 hours later, the final pass was produced as an Operational Geophysical Data Record (OGDR) product and disseminated to operational users. Interim Geophysical Data Record (IDGR) production ceased about 2.5 days later, GDR production approximately 2 months later. The OGDR, IGDR, and GDR data can be found at NOAA's National Center for Environmental Information.