月基观测地球等离子体层极紫外辐射特性

发布时间：2018-09-08 09:17

【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35 081.75 km以内,等离子体层结构的典型尺度量级为637.85 km,He+30.4 nm辐射强度为0.02~11.4 Rayleigh。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2.0 Rayleigh,与地球等离子体层辐射量级相当。根据SELENE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入观测仪器,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5×1015cm-2。根据Apollo-12局地观测,在一个月球周期内,月面温度变化为80~390 K。得到的结果为月基极紫外观测仪器设计提供了重要依据。
[Abstract]:The ultraviolet radiation characteristics of the earth's plasma layer are studied. The results show that the top of the earth's plasma layer is located within 35 081.75 km, the typical scale of the plasma layer structure is 637.85 km, and the radiation intensity of He+30.4 nm is 0.02~11.4 Rayleigh. The results show that the total observation time of the lunar revolution period is about 12 Earth days, and the maximum latitude deviation and longitude deviation are about 7 degrees and 6 degrees respectively. According to SELENE data, the topographic features of the five quasi-landing areas where the EUV Observatory is located are described. It is proved that the EUV scattered from the lunar surface will not enter the observatory, and the topography in Hongwan is the most ideal. The proton and electron fluxes on the lunar surface are analyzed according to Apollo-12 and Apollo-15 solar wind data. According to Apollo-12 local observations, the lunar surface temperature varies from 80 K to 390 K in a lunar cycle. The results provide an important basis for the design of lunar-based EUV observatories.
【作者单位】：中国科学院长春光学精密机械与物理研究所;中国科学院研究生院;国家气象局空间天气监测与预警中心;
【基金】：国家自然科学基金资助项目(No.40774079,40774098,40890160) 公益性行业专项资助项目(No.CYHY06024)
【分类号】：P183

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