Abstract
As part of the Copernicus program of the European Commission, the European Space Agency (ESA) developed and operates the Sentinel-2 constellation (S2A, S2B and S2C); and in cooperation with the EUMETSAT, they are operating the Sentinel-3 constellation (S3A, S3B). Both are Earth Observation optical missions, where the Multi-Spectral Instrument (MSI) is carried on board Sentinel-2 mission and the Ocean and Land Colour Instrument (OLCI) and Sea Land Surface Temperature Radiometer (SLSTR) are on board the Sentinel-3 mission. In the framework of the Copernicus Optical Mission Performance Cluster (OPT-MPC), we use the Database for Imaging Multispectral Instruments and Tools for Radiometric Inter-comparison (DIMITRI) to assess the radiometric performance of the Level-1 user products. The aims of this presentation are 1) to provide an updated status of the missions; 2) to monitor the temporal evolution of the radiometry of the optical instruments (MSI, OLCI and SLSTR) for both units A and B and 3) to present an overview of the Sentinel-2C tandem-phase validation results.
The results show that MSI-A/B/C and OLCI-B meet the mission requirements, while OLCI-A and SLSTR-AB show slightly higher gain coefficients. A good stability of MSI and OLCI sensors could be observed, while SLSTR-A & B show slight positive trends. The results show a good agreement between MSI/OLI to better than 1% except band B01 (443 nm) over VNIR bands.
Furthermore, a radiometric validation of the tandem-phase of MSI-A/C will be presented using several vicarious methods such as Desert-PICS, Deep Convective Clouds (DCC) and direct-statistical methods. The Level-1C radiometry performance from both MSI-C vs MSI-A is within 1-2% over the VNIR, up to 5% over the SWIR spectral range.
Copernicus Sentinel-2 and Sentinel-3 Radiometric CalVal Status: An Overview of Sentinel-2C Tandem-phase Results
As part of the Copernicus program of the European Commission, the European Space Agency (ESA) developed and operates the Sentinel-2 constellation (S2A, S2B and S2C); and in cooperation with the EUMETSAT, they are operating the Sentinel-3 constellation (S3A, S3B). Both are Earth Observation optical missions, where the Multi-Spectral Instrument (MSI) is carried on board Sentinel-2 mission and the Ocean and Land Colour Instrument (OLCI) and Sea Land Surface Temperature Radiometer (SLSTR) are on board the Sentinel-3 mission. In the framework of the Copernicus Optical Mission Performance Cluster (OPT-MPC), we use the Database for Imaging Multispectral Instruments and Tools for Radiometric Inter-comparison (DIMITRI) to assess the radiometric performance of the Level-1 user products. The aims of this presentation are 1) to provide an updated status of the missions; 2) to monitor the temporal evolution of the radiometry of the optical instruments (MSI, OLCI and SLSTR) for both units A and B and 3) to present an overview of the Sentinel-2C tandem-phase validation results.
The results show that MSI-A/B/C and OLCI-B meet the mission requirements, while OLCI-A and SLSTR-AB show slightly higher gain coefficients. A good stability of MSI and OLCI sensors could be observed, while SLSTR-A & B show slight positive trends. The results show a good agreement between MSI/OLI to better than 1% except band B01 (443 nm) over VNIR bands.
Furthermore, a radiometric validation of the tandem-phase of MSI-A/C will be presented using several vicarious methods such as Desert-PICS, Deep Convective Clouds (DCC) and direct-statistical methods. The Level-1C radiometry performance from both MSI-C vs MSI-A is within 1-2% over the VNIR, up to 5% over the SWIR spectral range.