Copernicus Sentinel-3 Optical Products: New Processing Baseline

We are pleased to announce new processing baselines for Copernicus Sentinel-3 concerning the following products:

• [OL_L1.003.03.00] = OL_1_EFR in NTC and OL_1_ERR in NTC timeliness, delivered by ESA

• [SYN_L2_.002.18.01] = SY_2_SYN and SY_2_VGP in NTC and STC timeliness delivered by ESA

• [SYN_L2V.002.09.01] = SY_2_VG1 and SY_2_V10 in NTC and STC timeliness delivered by ESA

• [AOD_NTC.002.08.01] = SY_2_AOD in NTC timeliness delivered by ESA

This Processing Baseline includes major changes for both OLCI and SYNERGY :

1. Concerning the definitions of OLCI L1B flag definitions, the detection and flagging of pixels that include partially saturated spectra, an update in geometric spatial regridding to improve image continuity between the OLCI cameras, and a routine revision of OLCI geometric and radiometric calibration.

2. Concerning the Spectral response functions, used to transform OLCI/SLSTR radiometric information into VGT band information, now updated and aligned with PROBA-V; the inclusion of SLSTR calibration factors and OLCI offsets defined during tandem mission; a correction regarding MIR radiometric values and the handling of saturation AOD and NDVI values.

Detailed information about the changes and the characterisation of the new versions of all these products is available in the following product notices:

• S3.PN.OLCI-L1.11 - i1r0 - OLCI L1 (PB OL_L1.003.03.00).pdf

• S3.PN.SLSTR-L1.10 - i1r0 - SLSTR L1 (PB SL_L1.004.06.00).pdf

• S3.PN.SYN-L2.09 - i1r0 - SYN L2 (PB SYN_L2_.002.18.01).pdf

• S3.PN.SYN-AOD.02 - i1r0 - SYN-AOD L2 (AOD_NTC.002.08.01).pdf

The new processing baseline should be deployed on 18/07/2023 for Sentinel-3B and on 25/07/2023 for Sentinel-3A.