Reflectance calibration and shadow effect of VNIS spectra acquired by the Yutu rover

查看全文 作　　者：Sen [1]Hu;Yang-Ting [1]Lin;Bin [2]Liu;Wei [1]Yang;Zhi-Ping [3]He;Wei-Fan [1,4]Xing

机构地区：[1]Key Laboratory of Earth and Planetary Physics, Institute of Geology and Geophysics, Chinese Academy of Sciences;[2]Key Laboratory of Lunar and Deep Space Exploration, National Astronomical Observatories,Chinese Academy of Sciences;[3]Key Laboratory of Space Active Opto-Electronics Technology, Shanghai Institute of Technical Physics, Chinese Academy of Sciences;[4]China University of Geosciences

出　　处：《Research in Astronomy and Astrophysics》索引2015年第15卷第9期,共10页

基　　金：supported by the Chinese Academy of Sciences (KGZD-EW-603);the National Natural Science Foundation of China (Grant No. 41103031) 摘　　要：Yutu is the first lunar rover after the Apollo program and Luna missions. One of the payloads on the Yutu rover, the Visible and Near-infrared Imaging Spectrometer(VNIS), has acquired four VIS/NIR images and SWIR spectra near its landing site in Mare Imbrium. The radiance images were reduced through repairing bad lines and bad points, and applying flat field correction, and then were converted into reflectance values based on the solar irradiance and angles of incidence. A significant shadow effect was observed in the VIS/NIR image. The shadowed regions show lower reflectance with a darkening trend compared with illuminated regions. The reflectance increased by up to 24% for entire images and 17% for the VIS/NIR-SWIR overlapping regions after shadow correction. The correction for the shadow effect will remarkably decrease the estimate of Fe O content, by up to 4.9 wt.% in this study. The derived Fe O contents of CD-005~008 after shadow correction are around 18.0 wt.%. 关键词：红外成像光谱仪阴影效果月球车反射率近红外图像 FEO含量阴影校正兔

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Reflectance calibration and shadow effect of VNIS spectra acquired by the Yutu rover

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