在轨航天器地气光环境分析  

In-orbit spacecraft's earth and atmosphere radiation environment analysis

作　　者：原育凯[1] 陈宏宇[1] 吴会英[1] 

机构地区：[1]上海微小卫星工程中心,上海200050

出　　处：《北京航空航天大学学报》2011年第2期136-139,共4页Journal of Beijing University of Aeronautics and Astronautics

基　　金：中科院知识创新工程(KGCX1-YW-16)

摘　　要：为得出定量化的遥感观测地气光环境数据,建立了简化的航天器地气光分布计算模型,首先将航天器及其各类运行轨道归纳到统一的照明模式中,地气光的分布主要考察航天器轨道面与地球晨昏面的夹角,然后考察航天器在每轨中的具体相位,以建立照度的几何传递关系;随后考察太阳辐照经地表后,最终到达航天器遥感观测载荷的光照度.计算结果能反映地气光在载荷观测方向2π半球视场内的分布情况,根据分布随空间变化的具体量级,对不同的离轴角进行照度积分,可转化为对观测仪器的地气光抑制能力要求.To provide quantitative reference for related space mission analysis,the remote sensing the earth and atmosphere radiation（EAR） simplified model was proposed.A universal irradiation model that suited for most kinds of spacecraft orbit was introduced,which reduced different orbit scenarios to different angles between the orbit plane and the dawn-dusk plane of the earth.Then the spacecraft position on each orbit,or the phase,was taken into account.The spacecraft remote sensing mode determined the main axis and field of view（FOV）.Irradiance propagation process was described with common hypothesis.Then the result display in two ways： distribution map and quantitative graph,which the former shows the relative position where the EAR is in the spacecraft＇s 2π hemisphere FOV,then the latter shows the magnitude distribution based on the average albedo.The following magnitude integral according to different off-axis angle could transform the faint target detecting requirement of space mission into the payload＇s stray light/radiation blocking requirement.A low earth orbit（LEO） observation example has been demonstrated at visible band.

关 键 词：地球大气 遥感观测 晨昏面 

分 类 号：TP702[自动化与计算机技术—检测技术与自动化装置]