18 November 2014 Calibration of Visible and Near-infrared Imaging Spectrometer (VNIS) on lunar surface
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Visible and Near-infrared Imaging Spectrometer (VNIS) is one of the scientific payloads mounted on “Yutu” rover in Chang’e 3 lunar exploration project. The VNIS is composed with a visible and near-infrared (0.45-0.95 μm) spectral imager and a short waveband (0.9-2.4 μm) spectrometer on basis of Acousto-Optic Tunable Filter. According to the in-situ analysis, a calibration unit was also equipped for high precisely spectral radiance and reflectance inversion by using solar as standard calibration source. The calibration unit was driven by lightweight ultrasonic motor, and it could be located on three fixed position including detection (full-opened), calibration (horizontal) and dust-proof (closed). In this paper, the principle of VNIS, especially calibration unit was described firstly. Then, radiometric correction algorithms on lunar surface based on standard solar spectral irradiance were expounded. Through the analysis of VNIS scientific data, the spectral radiance and reflectance curves of detection area were shown in the end.
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Rui Xu, Rui Xu, Gang Lv, Gang Lv, Yan-hua Ma, Yan-hua Ma, Jianyu Wang, Jianyu Wang, "Calibration of Visible and Near-infrared Imaging Spectrometer (VNIS) on lunar surface", Proc. SPIE 9263, Multispectral, Hyperspectral, and Ultraspectral Remote Sensing Technology, Techniques and Applications V, 926315 (18 November 2014); doi: 10.1117/12.2068947; https://doi.org/10.1117/12.2068947


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