Time series data correction for the Chang'E-1 gamma-ray spectrometer  

作　　者：Li-Yan Zhang Yong-Liao Zou Jian-Zhong Liu Jian-Jun Liu Ji Shen Ling-Li Mu Xin Ren Wei-Bin Wen Chun-Lai Li 

机构地区：[1]National Astronomical Observatories,Chinese Academy of Sciences,Beijing 100012,China [2]Graduate University of Chinese Academy of Sciences,Beijing 100049,China

出　　处：《Research in Astronomy and Astrophysics》2011年第6期737-750,共14页天文和天体物理学研究（英文版）

基　　金：supported by the National High Technology Research and Development Program of China (Grant Nos. 2008AA12A212 and 2010AA122202);the National Natural Science Foundation of China (Grant Nos. 41040031 and 40904024)

摘　　要：The main goal of the gamma-ray spectrometer（GRS） onboard Chang＇E1（CE-1） is to acquire global maps of elemental abundances and their distributions on the moon,since such maps will significantly improve our understanding of lunar formation and evolution.To derive the elemental maps and enable research on lunar formation and evolution,raw data that are received directly from the spacecraft must be converted into time series corrected gamma-ray spectra.The data correction procedures for the CE-1 GRS time series data are thoroughly described.The processing procedures to create the time series gamma-ray spectra described here include channel processing,optimal data selection,energy calibration,gain correction,dead time correction,geometric correction,orbit altitude normalization,eliminating unusable data and galactic cosmic ray correction.Finally,descriptions are also given on data measurement uncertainties,which will help the interested scientists to understand and estimate various uncertainties associated with the above data processing.The main goal of the gamma-ray spectrometer（GRS） onboard Chang＇E1（CE-1） is to acquire global maps of elemental abundances and their distributions on the moon,since such maps will significantly improve our understanding of lunar formation and evolution.To derive the elemental maps and enable research on lunar formation and evolution,raw data that are received directly from the spacecraft must be converted into time series corrected gamma-ray spectra.The data correction procedures for the CE-1 GRS time series data are thoroughly described.The processing procedures to create the time series gamma-ray spectra described here include channel processing,optimal data selection,energy calibration,gain correction,dead time correction,geometric correction,orbit altitude normalization,eliminating unusable data and galactic cosmic ray correction.Finally,descriptions are also given on data measurement uncertainties,which will help the interested scientists to understand and estimate various uncertainties associated with the above data processing.

关 键 词：instrumentation：spectrographs（gamm-ray spectrometer）-gammarays：observations-methods：data analysis 

分 类 号：TP13[自动化与计算机技术—控制理论与控制工程] P172.3[自动化与计算机技术—控制科学与工程]