Non-linearity analysis of a spectroradiometer

K. Torgasin; A. Baumgartner

doi:10.1117/12.3023000

28 May 2024 Non-linearity analysis of a spectroradiometer

K. Torgasin, A. Baumgartner

Proceedings Volume 13083, SPIE Future Sensing Technologies 2024; 130831D (2024) https://doi.org/10.1117/12.3023000
Event: SPIE Future Sensing Technologies, 2024, Yokohama, Japan

Conference Poster

Abstract

Hyperspectral analysis is an important remote sensing tool. Corresponding spectrometers require accurate calibration in optical laboratories. Non-linearity and temperature dependence are important factors that degrade the calibration quality. In this paper, we report on the investigation of the non-linearity of a temperature stabilized spectroradiometer HR-1024i from Spectra Vista Corporation (SVC). The spectroradiometer is applied as transfer spectroradiometer for the radiometric calibration of air- and spaceborne imaging spectrometers. Results show signal dependent non-linearity. The non-linearity of the spectrometer’s VNIR detector in spectral range 450 − 980 nm shows a strong spectral channel dependence with maximal radiometric error of 2%. The non-linearity of the SWIR-2 detector in spectral range 1896 − 2510 nm could not be evaluated precisely due to the low signal level. This impact of non-linearity requires correction in post-data processing.

(2024) Published by SPIE. Downloading of the abstract is permitted for personal use only.

Citation Download Citation

K. Torgasin and A. Baumgartner "Non-linearity analysis of a spectroradiometer", Proc. SPIE 13083, SPIE Future Sensing Technologies 2024, 130831D (28 May 2024); https://doi.org/10.1117/12.3023000

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