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The credibility of the spacecraft telemetry data can be used to characterize the confidence degree of telemetry data and improve the accuracy of the spacecraft condition monitoring and diagnosis system. This paper proposed the telemetry data credibility calculation methods based on the probability statistics and fuzzy algorithm, the process and performance of the algorithms were studied and analyzed. Besides, the data credibility calculation software is realized and applied. The experiment result shows the proposed methods can be effectively applied to the monitoring and diagnosing the spacecraft telemetry data, and has strong practical significance in the field of the spacecraft engineering project. Keywordscredibility; telemetry data; probability statistics; fuzzy algorithm; spacecraft

The Study of the Spacecraft Telemetry Data Credibility Calculation Method based on the Probability Statistics and Fuzzy Algorithm