NSSC OpenIR
Photometric Normalization of Chang'e-4 Visible and Near-Infrared Imaging Spectrometer Datasets: A Combined Study of In-Situ and Laboratory Spectral Measurements
Alternative TitleWOS:000587226900001;20204309383733
Qi, Xiaobin; Ling, Zongcheng1; Zhang, Jiang; Chen, Jian; Cao, Haijun; Liu, Changqing; Qiao, Le; Fu, Xiaohui1; He, Zhiping2; Xu, Rui2; Liu, Jianzhong3; Zou, Yongliao4
Source PublicationREMOTE SENSING
2020
Volume12Issue:19Pages:3211
DOI10.3390/rs12193211
Language英语
KeywordChang'e-4 visible and near-infrared imaging spectrometer lunar soils photometric correction phase function surface roughness BIDIRECTIONAL REFLECTANCE SPECTROSCOPY POLE-AITKEN BASIN LANDING SITE OPTICAL MEASUREMENTS MOON SURFACE CALIBRATION PARAMETERS PYROXENE MERCURY
AbstractUntil 29 May 2020, the Visible and Near-Infrared Imaging Spectrometer (VNIS) onboard the Yutu-2 Rover of the Chang'e-4 (CE-4) has acquired 96 high-resolution surface in-situ imaging spectra. These spectra were acquired under different illumination conditions, thus photometric normalization should be conducted to correct the introduced albedo differences before deriving the quantitative mineralogy for accurate geologic interpretations. In this study, a Lommel-Seeliger (LS) model and Hapke radiative transfer (Hapke) model were used and empirical phase functions of the LS model were derived. The values of these derived phase functions exhibit declining trends with the increase in phase angles and the opposition effect and phase reddening effect were observed. Then, we discovered from in-situ and laboratory measurements that the shadows caused by surface roughness have significant impacts on reflectance spectra and proper corrections were introduced. The validations of different phase functions showed that the maximum discrepancy at 1500 nm of spectra corrected by the LS model was less (similar to 3.7%) than that by the Hapke model (similar to 7.4%). This is the first time that empirical phase functions have been derived for a wavelength from 450 to 2395 nm using in-situ visible and near-infrared spectral datasets. Generally, photometrically normalized spectra exhibit smaller spectral slopes, lower FeO contents and larger optical maturity parameter (OMAT) than spectra without correction. In addition, the band centers of the 1 and 2 mu m absorption features of spectra after photometric normalization exhibit a more concentrated distribution, indicating the compositional homogeneity of soils at the CE-4 landing site.
Indexed BySCI ; EI
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Document Type期刊论文
Identifierhttp://ir.nssc.ac.cn/handle/122/7699
Collection中国科学院国家空间科学中心
Affiliation1.Shandong Univ, Inst Space Sci, Sch Space Sci & Phys, Shandong Key Lab Opt Astron & Solar Terr Environm, Weihai 264209, Peoples R China
2.Chinese Acad Sci, CAS Ctr Excellence Comparat Planetol, Hefei 230026, Peoples R China
3.Chinese Acad Sci, Shanghai Inst Tech Phys, Key Lab Space Act Optoelect Technol, Shanghai 200083, Peoples R China
4.Chinese Acad Sci, Inst Geochem, Guiyang 550002, Peoples R China
5.Chinese Acad Sci, Natl Space Sci Ctr, State Key Lab Space Weather, Beijing 100190, Peoples R China
Recommended Citation
GB/T 7714
Qi, Xiaobin,Ling, Zongcheng,Zhang, Jiang,et al. Photometric Normalization of Chang'e-4 Visible and Near-Infrared Imaging Spectrometer Datasets: A Combined Study of In-Situ and Laboratory Spectral Measurements[J]. REMOTE SENSING,2020,12(19):3211.
APA Qi, Xiaobin.,Ling, Zongcheng.,Zhang, Jiang.,Chen, Jian.,Cao, Haijun.,...&Zou, Yongliao.(2020).Photometric Normalization of Chang'e-4 Visible and Near-Infrared Imaging Spectrometer Datasets: A Combined Study of In-Situ and Laboratory Spectral Measurements.REMOTE SENSING,12(19),3211.
MLA Qi, Xiaobin,et al."Photometric Normalization of Chang'e-4 Visible and Near-Infrared Imaging Spectrometer Datasets: A Combined Study of In-Situ and Laboratory Spectral Measurements".REMOTE SENSING 12.19(2020):3211.
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