The Absolute Reflectance and New Calibration Site of the Moon
Wu,Yunzhao1,2; Wang,Zhenchao3,4; Cai,Wei5; Lu,Yu5,6
Source PublicationThe Astronomical Journal
AbstractAbstract How bright the Moon is forms a simple but fundamental and important question. Although numerous efforts have been made to answer this question such as use of sophisticated electro-optical measurements and suggestions for calibration sites, the answer is still debated. An in situ measurement with a calibration panel on the surface of the Moon is crucial for obtaining the accurate absolute reflectance and resolving the debate. China’s Chang’E-3 (CE-3) “Yutu” rover accomplished this type of measurement using the Visible-Near Infrared Spectrometer (VNIS). The measurements of the VNIS, which were at large emission and phase angles, complement existing measurements for the range of photometric geometry. The in situ reflectance shows that the CE-3 landing site is very dark with an average reflectance of 3.86% in the visible bands. The results are compared with recent mission instruments: the Lunar Reconnaissance Orbiter Camera (LROC) Wide Angle Camera (WAC), the Spectral Profiler (SP) on board the SELENE, the Moon Mineralogy Mapper (M3) on board the Chandrayaan-1, and the Chang’E-1 Interference Imaging Spectrometer (IIM). The differences in the measurements of these instruments are very large and indicate inherent differences in their absolute calibration. The M3 and IIM measurements are smaller than LROC WAC and SP, and the VNIS measurement falls between these two pairs. When using the Moon as a radiance source for the on-orbit calibration of spacecraft instruments, one should be cautious about the data. We propose that the CE-3 landing site, a young and homogeneous surface, should serve as the new calibration site.
Keywordinstrumentation: spectrographs planets and satellites: composition planets and satellites: detection techniques: imaging spectroscopy
WOS IDIOP:0004-6256-155-5-aabaf5
PublisherThe American Astronomical Society
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Document Type期刊论文
Affiliation1.Key Laboratory of Planetary Sciences, Purple Mountain Observatory, Chinese Academy of Sciences, Nanjing 210034, People's Republic of China
2.Space Science Institute, Macau University of Science and Technology, Macau, People's Republic of China
3.Institute of Surficial Geochemistry, Department of Earth Sciences, Nanjing University, Nanjing 210023, People's Republic of China
4.Key Laboratory of Radiometric Calibration and Validation for Environmental Satellites, National Satellite Meteorological Center, China Meteorological Administration, Beijing, People's Republic of China
5.School of Geographic and Oceanographic Sciences, Nanjing University, Nanjing, 210023, People's Republic of China
6.Jiangsu Center for Collaborative Innovation in Geographical Information Resource Development and Application, Nanjing 210023, People's Republic of China
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GB/T 7714
Wu,Yunzhao,Wang,Zhenchao,Cai,Wei,et al. The Absolute Reflectance and New Calibration Site of the Moon[J]. The Astronomical Journal,2018,155(5).
APA Wu,Yunzhao,Wang,Zhenchao,Cai,Wei,&Lu,Yu.(2018).The Absolute Reflectance and New Calibration Site of the Moon.The Astronomical Journal,155(5).
MLA Wu,Yunzhao,et al."The Absolute Reflectance and New Calibration Site of the Moon".The Astronomical Journal 155.5(2018).
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