Radiance source for in-flight calibration of VIS-NIR spectrometers

Karl-Heinz Suemnich; Bernd Paul Kunkel; Bernd Harnisch

doi:10.1117/12.325646

3 October 1998 Radiance source for in-flight calibration of VIS-NIR spectrometers

Karl-Heinz Suemnich, Bernd Paul Kunkel, Bernd Harnisch

Proceedings Volume 3439, Earth Observing Systems III; (1998) https://doi.org/10.1117/12.325646
Event: SPIE's International Symposium on Optical Science, Engineering, and Instrumentation, 1998, San Diego, CA, United States

Abstract

Imaging spectrometers for the earth observation on unmanned satellites usually work for some years without a chance of direct inspection of their performance data other than by ground-based data evaluation, given and determined during the integration and calibration procedure on ground. Radiance sources, integrated in the instrument assembly itself, can be used for periodic check of the stability or the changes in some instrument parameters, which influence the reliability of the remotely sounded data. Beside absolute recalibrations with the extraterrestrial sun irradiance via a diffuser, such relative calibrations with internal methods and means provide actual data of the instrument state every time. On the basis of the experience of in-flight calibrations with miniaturized lamps in the multichannel spectrometers MKS and the imaging spectrometer MOS a lot of test procedures were made to verify these lamps for purposes of the in-flight calibration of the High Resolution Imaging Spectrometer (HRIS) with an extended spectral range up to 2.35 micrometers . This paper describes the laboratory test during the HRIS phase-A study and some examples of in-flight calibrations during the orbit missions are discussed.

Citation Download Citation

Karl-Heinz Suemnich, Bernd Paul Kunkel, and Bernd Harnisch "Radiance source for in-flight calibration of VIS-NIR spectrometers", Proc. SPIE 3439, Earth Observing Systems III, (3 October 1998); https://doi.org/10.1117/12.325646

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