Assessing the inherent uncertainties in satellite data products is a challenging task. The success or failure of any Earth Observation (EO) mission depends on the quality of its data. To achieve optimum levels of reliability, most sensors are calibrated pre-launch. However, the characteristics of the sensor may change during launch and when the satellite is on-orbit. Post-launch calibration is therefore essential for detecting any changes that occurred during launch and during the entire lifetime of the sensor while in-orbit. However, on-board calibrators are also susceptible to degradation over time.

CIMEL intervenes in the process of calibrating satellite instrumentations and validating their data on atmospheric composition post-launch.