Method for determining illumination intensity of lunar shadow area of earth orbit satellite

The invention discloses a method for determining the illumination intensity of a moon shadow area of an earth orbit satellite. The method can be applied to various earth orbit satellites such as sun synchronous satellites, freezing satellites and geostationary satellites. Determining an equivalent view field according to the positions and radiuses of the sun and the moon; when the moon shadow appears, calculating the circle center distance between the projection circles of the sun and moon view fields; and calculating the intersection condition of the two projection circles by combining the radiuses of the projection circles. The technology can effectively judge whether the satellite experiences the lunar shadow or not in real time, can forecast the future lunar shadow condition according to theoretical data, is simple and efficient in algorithm, and is suitable for satellite on-orbit real-time calculation. 本发明公开了一种地球轨道卫星月影区光照强度确定方法，可应用于太阳同步、冻结、地球静止等各类地球轨道卫星。根据太阳、月球位置及半径确定等效视场；当出现月影后，计算太阳、月球视场投影圆的圆心距；结合投影圆半径，