第18卷第12期 2010年12月
文章编号
1004-924X(2010)12-2564-10
光学精密工程
Optics and Precision Engineering
Vol.18No.12
Dee.2010
月基观测地球等离子体层极紫外辐射特性
何飞1-2，陈波，张效信3
（1.中国科学院长春光学精密机械与物理研究所，吉林长春130033；
2.中国科学院研究生院，北京100039；3.国家气象局空间天气监测与预警中心，北京100081）摘要：研究了地球等离子体层的极紫外辐射特性.结果表明从月球上探测时地球等离子体层顶位于35081.75km以内，等离子体层结构的典型尺度量级为637.85km，He30.4nm辐射强度为0.02～11.4Rayleigh。讨论了月球轨道运动特性和月球表面环境特性，结果显示在一个月球公转周期内，总观测时间约为12个地球日，极紫外观测仪器对地指向的纬度最大偏移约为7°，经度最大偏移约为6°。对月面的极紫外辐射分析表明，太阳峰年月面散射的极紫外辐射强度约为 2.0Rayleigh，与地球等离子体层输射量级相当。根据SEI.ENE数据，描述了极紫外观测仪器所在的5个拟着陆区的地貌特征，证明了月面散射的极紫外辐射不会进人观测仪器，其中虹湾区的地形最为理想。根据Apollo-12和Apollo-15太阳风数据分析了月面质子和电子通量.结果显示在太阳峰年，一年内两者的总流量均为约5×10"cm-2，根据Apollo-12 局地观测，在一个月球周期内，月面温度变化为80～390K。得到的结果为月基极紫外观测仪器设计提供了重要依据。关键词：地球等离子体层；月基观测；极紫外观测仪器；月球环境
中图分类号：TH762;P354
文献标识码：A
doi:10.3788/0PE.20101812.2564
Moon-based imagingof earthplasmaspheric
extremeultravioletradiation HE Fei-2,CHEN Bo',ZHANG Xiao-xin
(l.Changchun Institution of Optics,FineMechanics and Physics,
ChineseAcademy of Sciences,Changchun 130033,China;
2.GraduateUniversity of Chinese Academy of Sciences,Beijing100039,Chind;
3.National Center for Space Weather,China Meteorological Administration,Beijing10o081,China) Abstract: The extreme ultraviolet radiation properties of the earth plasmasphere was firstly studied, which shows that the plasmapause is mainly located near 35 081. 75 km, the typical scale of the plasmasphere structures is 637. 85 km, and the He+ 30. 4 nm emission intensity is between 0. 02 and 11, 4 Rayleigh when the plasmasphere is detected from the moon. Then,the orbital characteristics and surface environmental properties of the moon were described and it is pointed out that the total ima ging period of an extreme ultraviolet imager is 12 d, in which the maximum latitudinal drift of the po-sitioning of the camera is 7° while the maximum longitudinal drift is 6°. The extreme ultraviolet radia-tion of the lunar surface was analyzed,and results indicate that the extreme ultraviolet radiation reflec
收稿日期：2010-04-07；修订日期：2010-05-28，
基金项目：国家自然科学基金资助项月（No，40774079，40774098，40890160）；公益性行业专项资助项目（No.
CYHY06024)