Once the sensors have been calibrated and the data analysis methodologies and derived environmental parameter validated, earth observation makes possible quantitative statements about a number of our planet's parameters. The "Validation" team uses physically based models and ground-based measurement systems to optimise analytical methodologies for the remote sensing of water bodies and to confirm the precision of derived atmosphere, hydrosphere, cryosphere and pedosphere parameters. Its measurement equipment on hand includes laboratory and field spectrometers for carrying out the following measurements in the visible and near-infrared ranges:
The models and software for the data analysis of water bodies make it possible to correct for reflection from water surfaces, regional and seasonal variations in the optical parameters of water bodies and substrates, and to remedy errors in sensor calibration and atmospheric correction.
Validation of environmental parameters and models takes place in field campaigns in cooperation with partners who carry out additional measurements. Our sensors are optimised for use in inland waters but are also suitable for other water bodies and land surfaces. They are characterised and calibrated in collaboration with the "Calibration of Optical Systems" team.