Comparison and evaluation of the Chang'E microwave radiometer data based on theoretical computation of brightness temperatures at the Apollo 15 and 17 sites
文献类型：期刊论文
| 作者 | Hu, Guo-Ping1,2,3; Chan, Kwing L.1,2,3; Zheng, Yong-Chun1,2,3,4 ; Tsang, Kang T.5; Xu, Ao-Ao1,2,3
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| 刊名 | ICARUS
 |
| 出版日期 | 2017-09-15 |
| 卷号 | 294页码:72-80 |
| 关键词 | Evaluation Chang'e (CE) Microwave brightness temperature (TB) Transfer model |
| 英文摘要 | There are significant differences (in the order of 3 to 20 K) between the lunar brightness temperatures (TBs) as measured by the microwave radiometers (MRM) onboard Chang'E (CE)-1 and -2. To determine which set is more accurate, we have carried out a dataset comparison using theoretical calculations of the TBs (four frequency channels) versus local time at the Apollo 15 and 17 landing sites, where the thermal parameters are well-constrained by the in-situ measurements. Based on these parameters, we sought to constrain fits between theory and observation, as uncertainties still exist in parameters involved in the microwave transfer computation. We found that: (i) CE-1/2 TBs have almost constant biases (negative, different for different channels) from the theoretical TBs. The averaged biases for each channel are smaller for CE-1; (ii) TBs of the high frequency channels (19.35/37 GHz) show a better fit with theory than the low frequency channels. The channel 4 (37 GHz) TBs from CE-1 are consistently shifted by about 1 K from the theoretical values. Adjustments in the order of 20 K are instead needed for the two CE-2 low frequency channels (3/7.8 GHz). Based on this comparison, we conclude that the CE-1 dataset to be more accurate than CE-2 one in terms of temperature accuracy (not spatial resolution). We also offer a possible explanation for the significant TB differences between CE-1 and CE-2, and propose a possible recalibration method as a starting point towards the realignment of the two datasets. (C) 2017 Elsevier Inc. All rights reserved. |
| WOS标题词 | Science & Technology ; Physical Sciences |
| 类目[WOS] | Astronomy & Astrophysics |
| 研究领域[WOS] | Astronomy & Astrophysics |
| 关键词[WOS] | MOON ; REGOLITH ; PROGRAM ; ICE |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000403734700005 |
| 源URL | [http://ir.bao.ac.cn/handle/114a11/8839]  |
| 专题 | 国家天文台_月球与深空探测研究部 |
| 作者单位 | 1.Macau Univ Sci & Technol, Space Sci Inst, Macau, Peoples R China 2.Macau Univ Sci & Technol, Lunar Planetary Sci Lab, Macau, Peoples R China 3.Chinese Acad Sci, Key Lab Lunar & Deep Space Explorat, Partner Lab, Macau, Peoples R China 4.Chinese Acad Sci, Natl Astron Observ, Key Lab Lunar & Deep Space Explorat, Beijing 100012, Peoples R China 5.Beijing Normal Univ Hong Kong Baptist Univ United, Zhuhai 519000, Peoples R China |
| 推荐引用方式 GB/T 7714 | Hu, Guo-Ping,Chan, Kwing L.,Zheng, Yong-Chun,et al. Comparison and evaluation of the Chang'E microwave radiometer data based on theoretical computation of brightness temperatures at the Apollo 15 and 17 sites[J]. ICARUS,2017,294:72-80. |
| APA | Hu, Guo-Ping,Chan, Kwing L.,Zheng, Yong-Chun,Tsang, Kang T.,&Xu, Ao-Ao.(2017).Comparison and evaluation of the Chang'E microwave radiometer data based on theoretical computation of brightness temperatures at the Apollo 15 and 17 sites.ICARUS,294,72-80. |
| MLA | Hu, Guo-Ping,et al."Comparison and evaluation of the Chang'E microwave radiometer data based on theoretical computation of brightness temperatures at the Apollo 15 and 17 sites".ICARUS 294(2017):72-80. |
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来源：国家天文台
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