The Sentinel-3 Validation Team (S3VT) open call is accessible from the ESA EOPI web page at https://earth.esa.int/aos/S3VT. In the framework of a Copernicus collaborative agreement, the call issued by ESA and EUMETSAT endeavours “To engage world-class validation expertise and activities to complement Sentinel-3 routine validation activities and ensure the best possible outcomes for the Sentinel-3 Mission“. Since the first S3VT workshop in March 2012 and the opening of the S3VT call, there are now more than 300 PIs on the Team. Since then some activities and teams may have evolved. ESA and EUMETSAT would be grateful if you could update your proposal if there are any changes to your team or activities (or submit a new proposal) to better prepare us for S3VT collaborations and the 6th S3VT meeting in December 2020. The deadline for these updates is 15 October 2020. Otherwise, the S3VT call will remain to be open to the community.