An on-board calibration assembly (OBCA) on the ENMAP satellite

The Environmental Mapping and Analysis Program (EnMAP) is a German hyperspectral satellite mission that aims at monitoring and characterizing the Earth’s environment on a global scale. Its hyperspectral imager (HSI) is capable of measuring the solar radiance reflected from the Earth’s surface as a continuous spectrum in the spectral range of 420 nm to 2450 nm.