Calibration procedures for imaging spectrometers: improving data quality from satellite missions to UAV campaigns

Johannes F. S. Brachmann; Andreas Baumgartner; Karim Lenhard

doi:10.1117/12.2240076

19 October 2016 Calibration procedures for imaging spectrometers: improving data quality from satellite missions to UAV campaigns

Johannes F. S. Brachmann, Andreas Baumgartner, Karim Lenhard

Author Affiliations +

Proceedings Volume 10000, Sensors, Systems, and Next-Generation Satellites XX; 1000010 (2016) https://doi.org/10.1117/12.2240076
Event: SPIE Remote Sensing, 2016, Edinburgh, United Kingdom

Abstract

The Calibration Home Base (CHB) at the Remote Sensing Technology Institute of the German Aerospace Center (DLR-IMF) is an optical laboratory designed for the calibration of imaging spectrometers for the VNIR/SWIR wavelength range. Radiometric, spectral and geometric characterization is realized in the CHB in a precise and highly automated fashion. This allows performing a wide range of time consuming measurements in an efficient way. The implementation of ISO 9001 standards ensures a traceable quality of results. DLR-IMF will support the calibration and characterization campaign of the future German spaceborne hyperspectral imager EnMAP. In the context of this activity, a procedure for the correction of imaging artifacts, such as due to stray light, is currently being developed by DLR-IMF. Goal is the correction of in-band stray light as well as ghost images down to a level of a few digital numbers in the whole wavelength range 420-2450 nm. DLR-IMF owns a Norsk Elektro Optikks HySpex airborne imaging spectrometer system that has been thoroughly characterized. This system will be used to test stray light calibration procedures for EnMAP. Hyperspectral snapshot sensors offer the possibility to simultaneously acquire hyperspectral data in two dimensions. Recently, these rather new spectrometers have arisen much interest in the remote sensing community. Different designs are currently used for local area observation such as by use of small unmanned aerial vehicles (sUAV). In this context the CHB's measurement capabilities are currently extended such that a standard measurement procedure for these new sensors will be implemented.

Conference Presentation

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Johannes F. S. Brachmann, Andreas Baumgartner, and Karim Lenhard "Calibration procedures for imaging spectrometers: improving data quality from satellite missions to UAV campaigns", Proc. SPIE 10000, Sensors, Systems, and Next-Generation Satellites XX, 1000010 (19 October 2016); https://doi.org/10.1117/12.2240076

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