Navigation constellation on-orbit operation risk assessment system and method based on weighted probability

Abstract

The invention provides a weighted probability-based navigation constellation on-orbit operation risk assessment system and method, and belongs to the technical field of navigation constellation assessment. The system comprises a risk factor identification module, a satellite configuration analysis module, a satellite health state analysis module, a satellite on-orbit use analysis module and a networking satellite comprehensive risk assessment module; the risk factor identification module is used for identifying risk factors in an on-orbit operation state of the satellite, and the risk factorscomprise constellation configuration risk factors, networking satellite on-orbit health state risk factors and on-orbit use conditions; the satellite configuration analysis module, the satellite health state analysis module and the satellite in-orbit use analysis module calculate the risk comprehensive weighting probability, the weighting probability of the health state of each orbit satellite andthe in-orbit use weighting probability of each orbit satellite under the condition that each orbit satellite is unavailable according to the identified risk; and the networking satellite comprehensive risk assessment module assesses the comprehensive risk of each orbit satellite according to each weighting probability.

Description

technical field [0001] The invention relates to a weighted probability-based navigation constellation on-orbit operation risk assessment system and method, and belongs to the technical field of navigation constellation assessment. Background technique [0002] The Beidou navigation system has provided all-weather and all-day positioning, navigation and timing services to the world, and is currently in the initial stage of in-orbit operation. The Beidou navigation system is directly oriented to the military and global users, and its on-orbit service life is as long as 10 to 12 years. The accuracy, integrity, continuity and availability of satellite navigation services have put forward more stringent requirements for the on-orbit service performance of the Beidou constellation system. Stringent requirements. The Beidou navigation system is a large-scale hybrid navigation constellation system consisting of several navigation satellites covering three orbits (GEO, IGSO, MEO). I...

AI Technical Summary

Problems solved by technology

However, satellite anomalies and anomalies of different types and orbital positions have great differences in the impact on constellation service performance; at the same time, there are also great differences in the types of services provided by satellites, the number of users, and the degree of user dependence.

If the comprehensive impact of these factors and their differences on the performance of constellation services is ignored, or simply superimposed analysis and judgment on various influencing factors, it may affect the rationality and comprehensiveness of constellation management measures, and even lead to a change in the unavailable time of constellation services. long, reducing user experience satisfaction

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