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lunarpotassiumdistributionresultsfromchange1gammarayspectrometer
Zhu Menghua1; Ma Tao2; Chang Jin2; Tang Zesheng1; Ip Winghuen1; Xu Aoao1
2011
Source Publicationsciencechinaphysicsmechanicsastronomy
ISSN1674-7348
Volume54Issue:11Pages:2083
AbstractThe global map of potassium is represented in this paper from Chang'E-1 (CE-1) Gamma-ray Spectrometer (CGRS) for its one-year mission.Assuming a linear relationship between net count rate and its abundance,the average potassium abundance of individual landing sites is used as ground-truth for the calibration to derive the global map of absolute concentration.Although CGRS spectra have a lower signal-to-noise ratio,the translated map still keeps relative variations.As calculated from Apollo,Lunar Prospector,and Kaguya,global potassium map from CGRS shows high concentrations on the lunar nearside and secondary concentrations located in the South Pole-Aitken (SPA) basin on the farside.The comparison with Lunar Prospector potassium map shows a good correlation,though abundances on the highlands of the farside are much lower than that of Lunar Prospector.Since the footprint of CGRS measurements is larger than the sampling radius of each landing site,the calibrated map shows a larger variation range of the scale than that of Lunar Prospector,which was derived using theoretical calculation;namely,the calibrated map has higher values in the areas with high concentration while having lower values for the areas with lower concentration.However,the derived potassium map is more consistent with the lunar sample data than that of Lunar Prospector.
Language英语
Document Type期刊论文
Identifierhttp://libir.pmo.ac.cn/handle/332002/31956
Collection中国科学院紫金山天文台
Affiliation1.Space Exploration Laboratory,Macau University of Science and Technology
2.中国科学院紫金山天文台
Recommended Citation
GB/T 7714
Zhu Menghua,Ma Tao,Chang Jin,et al. lunarpotassiumdistributionresultsfromchange1gammarayspectrometer[J]. sciencechinaphysicsmechanicsastronomy,2011,54(11):2083.
APA Zhu Menghua,Ma Tao,Chang Jin,Tang Zesheng,Ip Winghuen,&Xu Aoao.(2011).lunarpotassiumdistributionresultsfromchange1gammarayspectrometer.sciencechinaphysicsmechanicsastronomy,54(11),2083.
MLA Zhu Menghua,et al."lunarpotassiumdistributionresultsfromchange1gammarayspectrometer".sciencechinaphysicsmechanicsastronomy 54.11(2011):2083.
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