Abstract
The Calibration Home Base (CHB) is an optical laboratory designed for the calibration of imaging spectrometers for the VNIR/SWIR wavelength range. Radiometric, spectral and geometric calibration as well as the characterization of sensor signal dependency on polarization are realized in a precise and highly automated fashion. This allows to carry out a wide range of time consuming measurements in an ecient way. The implementation of ISO 9001 standards in all procedures ensures a traceable quality of results. Spectral measurements in the wavelength range 380–1000 nm are performed to a wavelength uncertainty of +- 0.1 nm, while an uncertainty of +-0.2 nm is reached in the wavelength range 1000 – 2500 nm. Geometric measurements are performed at increments of 1.7 µrad across track and 7.6 µrad along track. Radiometric measurements reach an absolute uncertainty of +-3% (k=1). Sensor artifacts, such as caused by stray light will be characterizable and correctable in the near future. For now, the CHB is suitable for the characterization of pushbroom sensors, spectrometers and cameras. However, it is planned to extend the CHBs capabilities in the near future such that snapshot hyperspectral imagers can be characterized as well. The calibration services of the CHB are open to third party customers from research institutes as well as industry.
Highlights
The Calibration Home Base (CHB) is an optical laboratory developed and operated by the German Aerospace Center (DLR) Oberpfa enhofen for the calibration of hyperspectral sensors and eld spectrometers
NEO HySpex VNIR-1600 and SWIR-320me sensors, which are owned by DLRs Remote Sensing Technology Institute (DLR-IMF) are regularly calibrated in the facility (Lenhard, Baumgartner, & Schwarzmaier, 2015)
The calibration laboratory for imaging and eld spectrometers at the German Aerospace Center in Oberpfa enhofen has been operational for 10 years
Summary
The Calibration Home Base (CHB) is an optical laboratory developed and operated by the German Aerospace Center (DLR) Oberpfa enhofen for the calibration of (airborne) hyperspectral sensors and eld spectrometers. NEO HySpex VNIR-1600 and SWIR-320me sensors, which are owned by DLRs Remote Sensing Technology Institute (DLR-IMF) are regularly calibrated in the facility (Lenhard, Baumgartner, & Schwarzmaier, 2015). It is the only facility in Europe which allows a precise characterization of the radiometric, geometric and spectral properties of bulky and heavy instruments up to 500 kg (including mechanical interface) in the wide spectral range 380–2500 nm. Pushbroom spectrometers have long been a standard design for airborne and satellite imaging spectrometers These are in the main focus of the calibration activities in the CHB.
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