Research on the Analysis Method for Antenna Pointing Error in the Spinning Module of Rotating Satellite System

For rotating satellites, the pointing calculation and pointing error of the antenna located in the spinning module during rotation are affected by various factors, which directly impact the antenna's transmitting and receiving capabilities. This paper proposes an analysis method for antenna pointing errors of the rotating module's antenna. Focusing on the characteristics of information transmission and rotation control in two-cabin satellites, the system framework is analyzed, a fault tree-based error chain analysis method is adopted to establish a system error model, and a configurable error simulation verification system is developed. This system enables the analysis of how different error sources affect antenna pointing errors in rotating satellites through error model configuration, providing guidance for error localization, precision decomposition, and control during engineering implementation.