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12 July 2019 Traceable radiance source for spectroradiometer calibration
Steven van den Berg, Paul Dekker, Tessel van der Laan, Gerard Otter, Niels Dijkhuizen, Bilgehan Gür, Sanneke Brinkers
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Proceedings Volume 11180, International Conference on Space Optics — ICSO 2018; 1118068 (2019) https://doi.org/10.1117/12.2536143
Event: International Conference on Space Optics - ICSO 2018, 2018, Chania, Greece
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.
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Steven van den Berg, Paul Dekker, Tessel van der Laan, Gerard Otter, Niels Dijkhuizen, Bilgehan Gür, and Sanneke Brinkers "Traceable radiance source for spectroradiometer calibration", Proc. SPIE 11180, International Conference on Space Optics — ICSO 2018, 1118068 (12 July 2019); https://doi.org/10.1117/12.2536143
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KEYWORDS
Calibration
Sensors
Free electron lasers
Lamps
Diffusers
Optical spheres
Integrating spheres
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