Calibration Home Base
The Calibration Home Base (CHB) is an optical laboratory for the calibration of airborne hyperspectral sensors and field spectrometers. It was partly funded by ESA to establish a calibration facility for the airborne imaging spectrometer APEX, but is used for other optical sensors as well. It is the only facility in Europe which allows precise characterization of the radiometric, geometric and spectral properties of bulky and heavy instruments up to 350 kg in a wide spectral range from 380 nm to 14 µm. Radiance sources traceable to national standard (PTB) are used for radiometric calibration. In particular for instruments with large aperture or large field of view, a large integrating sphere is available which provides very homogeneous radiance for an area of 55 x 40 cm².
Technical details of the CHB lab infrastructure can be found in the CHB flyer.