A new laboratory for the characterisation of hyperspectral airborne sensors

Abstract

A new facility designed to characterize the spectral, radiometric and geometric properties of hyperspectral airborne sensors was established at the German Aerospace Center (DLR) in Oberpfaffenhofen. This laboratory will serve as Calibration Home Base (CHB) for the airborne imaging spectrometer APEX (Airborne Prism Experiment), which is currently being developed under the authority of the European Space Agency (ESA). In APEX configuration (wavelength range: 380 to 2500 nm, instantaneous field of view: 0.48 mrad, field of view: ±14°) spectral measurements can be performed to a wavelength uncertainty of ±0.15 nm, geometric measurements at increments of 0.0017 mrad across track and 0.0076 mrad along track, and radiometric measurements to an uncertainty of ±3 % relative to national standard. Computer control of major laboratory equipment allows automation of time consuming measurements. The facility can be adapted to similar sensors including such with thermal infrared detectors.