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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.
In order to obtain the quantificational data of the light and light environment of the remote sensing observatory, a simplified model for calculating the gas-light distribution of the spacecraft is established. First, the spacecraft and its orbital trajectories are summarized into a unified illumination mode. Mainly investigates the angle between the orbital plane of the spacecraft and the dusk surface of the Earth, and then examines the specific phases of the spacecraft in each track to establish the geometric transfer relationship of the illuminance; and then examines the solar remote sensing observations of the spacecraft The results of the calculation can reflect the distribution of ground-light in the 2π hemisphere field of view in the direction of load observation. According to the specific magnitude of the distribution with space changes, the illumination points of different off-axis angles can be integrated into the illumination of observational instruments Ground light suppression ability requirements.