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Proceedings Paper • Open Access

Traceable radiance source for spectroradiometer calibration
Author(s): Steven van den Berg; Paul Dekker; Tessel van der Laan; Gerard Otter; Niels Dijkhuizen; Bilgehan Gür; Sanneke Brinkers

Paper Abstract

SI traceable calibration of satellite instruments like spectroradiometers get increasingly important in space-based observation for various reasons. First, requirements on measurements in terms of accuracy, dynamic range and wavelength range get increasingly demanding. Second, long term observations require SI traceability for comparability of data records that have been acquired over a long time interval (decades) and with different instruments. In this contribution we outline an approach for radiance calibration of spectroradiometers with a wavelength-tunable radiance source. The radiance source is based on an integrating sphere and a widely tunable laser (UVN-SWIR) and will be calibrated against a set of reference detector standards. By offering the radiance source as a stimulus to the spectroradiometer under test, the instrument can be calibrated for spectral radiance response. Potentially this traceability route could lead to a reduced measurement uncertainty compared to the traditional FEL-lamp based method. Furthermore, other instrument characteristics can also be derived from the same set of measurements, like stray-light effects and the instrument response function.

Paper Details

Date Published: 12 July 2019
PDF: 10 pages
Proc. SPIE 11180, International Conference on Space Optics — ICSO 2018, 1118068 (12 July 2019); doi: 10.1117/12.2536143
Show Author Affiliations
Steven van den Berg, VSL (Netherlands)
Paul Dekker, VSL (Netherlands)
Tessel van der Laan, TNO (Germany)
Gerard Otter, TNO (Netherlands)
Niels Dijkhuizen, TNO (Netherlands)
Bilgehan Gür, TNO (Netherlands)
Sanneke Brinkers, TNO (Netherlands)

Published in SPIE Proceedings Vol. 11180:
International Conference on Space Optics — ICSO 2018
Zoran Sodnik; Nikos Karafolas; Bruno Cugny, Editor(s)

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