一种精确计算低轨卫星太阳电池阵在轨 电流的方法

To address the challenge of precisely calculating the on-orbit current solar array of low Earth orbit（LEO）satellites under complex environmental effects，a method for calculating the in-orbit current of solar arrays，considering Earth albedo is proposed. First，by analyzing the short-period characteristics of the solar array current and considering the Earth-satellite-Sun spatial geometry，a criterion is established to determine the effective Earth albedo region acting on the solar array. Second，based on the Lambertian radiation model and discretized gridding of the Earth surface，a quantitative physical model of albedo irradiance is constructed. Finally，by integrating the albedo irradiance with conventional direct solar flux and temperature models，the accurate calculation of on-orbit solar array current is achieved. Comparison with on-orbit telemetry shows that the method accurately reproduces the current’s double-peaked profile，with the error between the computed results and the telemetry being less than 1. 8 %. The research establishes a universally applicable computational method for the precise quantification of on-orbit current in LEO satellite solar arrays，providing a valuable reference for the optimization-oriented design of high-precision satellite power systems.