Abstract
Sentinel-2 is an optical imaging mission devoted to the operational monitoring of land and coastal areas. It is developed in partnership between the European Commission and the European Space Agency. The Sentinel-2 mission is based on a satellites constellation deployed in polar sun-synchronous orbit. It will offer a unique combination of global coverage with a wide field of view (290km), a high revisit (5 days with two satellites), a high resolution (10m, 20m and 60m) and multi-spectral imagery (13 spectral bands in visible and shortwave infra-red domains). The first satellite is planned to be launched by mid-2015.
CNES is in charge of the geometric and radiometric calibration of the instrument during the commissioning phase in collaboration with ESA. The combination of vicarious and in-situ calibration techniques associated to on-board diffuser acquisitions is expected to provide very well calibrated L1C products. A review of the sentinel-2 radiometric calibration methods will be described in this presentation.
Moreover, CNES will operate a Sentinel-2 level 2 processing chain in the frame of THEIA land data center. We will introduce THIEA, the level-2 production methodology and then review the product validation strategy. The latter is based on reflectance and AOT in-situ measurements, and products and masks cross comparisons.
Sentinel-2 Calibration and Validation: from the Instrument to Level 2 Products
Sentinel-2 is an optical imaging mission devoted to the operational monitoring of land and coastal areas. It is developed in partnership between the European Commission and the European Space Agency. The Sentinel-2 mission is based on a satellites constellation deployed in polar sun-synchronous orbit. It will offer a unique combination of global coverage with a wide field of view (290km), a high revisit (5 days with two satellites), a high resolution (10m, 20m and 60m) and multi-spectral imagery (13 spectral bands in visible and shortwave infra-red domains). The first satellite is planned to be launched by mid-2015.
CNES is in charge of the geometric and radiometric calibration of the instrument during the commissioning phase in collaboration with ESA. The combination of vicarious and in-situ calibration techniques associated to on-board diffuser acquisitions is expected to provide very well calibrated L1C products. A review of the sentinel-2 radiometric calibration methods will be described in this presentation.
Moreover, CNES will operate a Sentinel-2 level 2 processing chain in the frame of THEIA land data center. We will introduce THIEA, the level-2 production methodology and then review the product validation strategy. The latter is based on reflectance and AOT in-situ measurements, and products and masks cross comparisons.