Attitude detection system for artificial satellite

An attitude detection system for an artificial satellite comprising a telemetry data memory for storing telemetry data received from the artificial satellite, a first data extractor for extracting attitude-angle calibration data from said telemetry data memory as time-series data, a second data extractor for extracting angular-velocity data from said telemetry data memory as time-series data, an interpolator for interpolating said angular-velocity data to generate interpolated angular-velocity data, a sequential Kalman filter for generating a low-frequency attitude-angle signal from said interpolated angular-velocity data and said attitude-angle calibration data, a third extractor for extracting high-frequency attitude-angle data as time-series data from said telemetry data memory to generate a high-frequency attitude-angle signal, and an adder for adding said low-frequency attitude-angle signal and said high-frequency attitude-angle signal to generate a broad-band attitude-angle signal.