为了从嫦娥一号伽玛射线谱仪(CE1-GRS)探测数据获取月表元素的分布特征,提出并实现了一种对CE1-GRS2C级数据进行处理的方法。采用该方法对CE1-GRS第一正飞期2C级数据产品进行分析处理,得到了Th元素计数率的全月分布图。与月球勘探者伽玛射线谱仪(LP-GRS)数据的Th全月分布图进行比较分析,结果表明,两者体现出的月表Th分布主要特征基本一致,但分布细节特征存在一些差异。
In order to acquire the global elemental distributions on the lunar surface, a method to process level 2C spectra data measured by ChangE-1 gamma-ray spectrometer (CE1-GRS) was proposed and im- plemented. After data processing made by this method to level 2C spectra measured from 27 Nov, 2007 to 6 Feb, 2008, preliminary global counting rate map of thorium is derived. Compared with the global map of thorium measured by the Lunar Prospector (LP) GRS, the result shows that major features of the global thorium distribution appeared in CE1 map is consistent with the map of thorium from the LP GRS, but there are still some differences in detail between these two maps.