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| Estimation of Noise in the In Situ Hyperspectral Data Acquired by Chang'E-4 and Its Effects on Spectral Analysis of Regolith | |
| Alternative Title | WOS:000543394800070;20202208774607 |
| Lin, Honglei; Lin, Yangting; Wei, Yong; Xu, Rui1; Liu, Yang2; Yang, Yazhou2; Hu, Sen; Yang, Wei; He, Zhiping1 | |
| Source Publication | REMOTE SENSING
 |
| 2020 | |
| Volume | 12Issue:10Pages:1603 |
| DOI | 10.3390/rs12101603 |
| Language | 英语 |
| Keyword | the Moon Chang'E-4 hyperspectral data noise estimation spectral interpretation NEAR-INFRARED SPECTRA LANDING SITE REFLECTANCE SPECTROSCOPY QUANTITATIVE-ANALYSIS LUNAR SURFACE IDENTIFICATION MINERALS CRATER SOILS |
| Abstract | The Chang'E-4 (CE-4) spacecraft landed successfully on the far side of the Moon on 3 January 2019, and the rover Yutu-2 has explored the lunar surface since then. The visible and near-infrared imaging spectrometer (VNIS) onboard the rover has acquired numerous spectra, providing unprecedented insight into the composition of the lunar surface. However, the noise in these spectral data and its effects on spectral interpretation are not yet assessed. Here we analyzed repeated measurements over the same area at the lunar surface to estimate the signal-noise ratio (SNR) of the VNIS spectra. Using the results, we assessed the effects of noise on the estimation of band centers, band depths, FeO content, optical maturity (OMAT), mineral abundances, and submicroscopic metallic iron (SMFe). The data observed at solar altitudes <20 degrees exhibit low SNR (25 dB), whereas the data acquired at 20 degrees-35 degrees exhibit higher SNR (35-37 dB). We found differences in band centers due to noise to be similar to 6.2 and up to 28.6 nm for 1 and 2 mu m absorption, respectively. We also found that mineral abundances derived using the Hapke model are affected by noise, with maximum standard deviations of 6.3%, 2.4%, and 7.0% for plagioclase, pyroxene, and olivine, respectively. Our results suggest that noise has significant impacts on the CE-4 spectra, which should be considered in the spectral analysis and geologic interpretation of lunar exploration data. |
| Indexed By | SCI ; EI |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://ir.nssc.ac.cn/handle/122/7670 |
| Collection | 中国科学院国家空间科学中心 |
| Affiliation | 1.Chinese Acad Sci, Inst Geol & Geophys, Key Lab Earth & Planetary Phys, Beijing 100029, Peoples R China 2.Chinese Acad Sci, Shanghai Inst Tech Phys, Key Lab Space Act Optoelect Technol, Shanghai 200083, Peoples R China 3.Chinese Acad Sci, Natl Space Sci Ctr, State Key Lab Space Weather, Beijing 100190, Peoples R China |
| Recommended Citation GB/T 7714 | Lin, Honglei,Lin, Yangting,Wei, Yong,et al. Estimation of Noise in the In Situ Hyperspectral Data Acquired by Chang'E-4 and Its Effects on Spectral Analysis of Regolith[J]. REMOTE SENSING,2020,12(10):1603. |
| APA | Lin, Honglei.,Lin, Yangting.,Wei, Yong.,Xu, Rui.,Liu, Yang.,...&He, Zhiping.(2020).Estimation of Noise in the In Situ Hyperspectral Data Acquired by Chang'E-4 and Its Effects on Spectral Analysis of Regolith.REMOTE SENSING,12(10),1603. |
| MLA | Lin, Honglei,et al."Estimation of Noise in the In Situ Hyperspectral Data Acquired by Chang'E-4 and Its Effects on Spectral Analysis of Regolith".REMOTE SENSING 12.10(2020):1603. |
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