The current OST constellation User Requirement Document (URD) is the 2009 "Next 15 years of altimetry" report. A re-assessment of user requirements will be undertaken considering recent activities related to future altimetry missions.
The OST-VC has been brought up-to-date on the status of the SAOO URD. It has been agreed that this will be the baseline for the OST-VC led URD. A side meeting with the OST-VC members will be held during the OSTST Meeting in Chicago, October 2019, to establish the way forward and distribute tasks.
New OST-VC white paper on user requirements will consider the current activities related to preparation of future Copernicus Altimetry missions (Sentinel-3 C/D units, Sentinel-3 Topography and Sentinel-6 Next Generation, CRISTAL) with important outcomes expected by beginning of 2022. A side meeting will be held during the next OSTST Meeting in Venice, March 2022, to establish the way forward and distribute tasks.
OST-VC is awaiting the outcome of the current preparatory activities for future Copernicus altimetry missions. The gaps left to be filled (particularly related to non-Copernicus opportunities and missions will be assessed). The final deliverable will then be ready around Q1 2023.