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Remote Sens. 2014, 6(2), 1158-1170; doi:10.3390/rs6021158
Article

In-Field Absolute Calibration of Ground and Airborne VIS-NIR-SWIR Hyperspectral Point Spectrometers

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Received: 18 December 2013 / Revised: 20 January 2014 / Accepted: 23 January 2014 / Published: 29 January 2014
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Abstract

Spectrometer calibration and measurements of spectral radiance are often required when performing ground, aerial, and space measurements. While calibrating a spectrometer in the field using an integrating sphere is practically unachievable, calibration against a quartz halogen (QH) lamp is a quite easy and feasible option. We describe a calibration protocol whereby a professional QH lamp, operating with a stabilized current source, is first calibrated in the laboratory against a US National Institute of Standards and Technology (NIST) traceable integrating sphere and, then, used for the field calibration of a spectrometer before a ground or airborne campaign. Another advantage of the lamp over the integrating sphere is its ability to create a continuous calibration curve at the spectrometer resolution, while the integrating sphere is calibrated only for a few discrete wavelengths. A calibrated lamp could also be used for a secondary continuous calibration of an un-calibrated integrating sphere.
Keywords: field spectroscopy; radiometric calibration; ASD; FieldSpec field spectroscopy; radiometric calibration; ASD; FieldSpec
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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Rozenstein, O.; Devir, A.; Karnieli, A. In-Field Absolute Calibration of Ground and Airborne VIS-NIR-SWIR Hyperspectral Point Spectrometers. Remote Sens. 2014, 6, 1158-1170.

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