Navigation constellation satellite backup method

A satellite and constellation technology, applied in the backup field of navigation constellation satellites, can solve the problems of inability to assess the impact, not considering the actual situation of the constellation satellites, and only considering the overall reliability of the constellation, so as to ensure the service performance of the constellation and flexibly control the service life of the constellation. , Satisfy the effect of precision

Active Publication Date: 2013-06-19
BEIJING INST OF SPACECRAFT SYST ENG
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  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Constellation reliability is used to statistically measure the possibility of a constellation providing a given service during its lifespan, without considering the actual situation of the constellation satellites in orbit, and cannot evaluate the impact of individual satellite service interruptions on constellation performance
In addition, the constellation backup method based on constellation reliability only considers the reliability of the constellation as a whole, while ignoring the reliability and failure risk of a single satellite

Method used

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  • Navigation constellation satellite backup method
  • Navigation constellation satellite backup method
  • Navigation constellation satellite backup method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] Assume the following constellations and user scenarios:

[0044] 1. The navigation constellation consists of 5 GEO satellites and 5 IGSO satellites.

[0045] 2. The GEO satellites are numbered 1, 2, 3, 4, and 5, located at 60°E, 80°E, 110°E, 130°E, and 160°E, respectively, with an eccentricity of 0.001°.

[0046] 3. The IGSO satellites are numbered 6, 7, 8, 9, and 10, with an orbital inclination of 54° and an eccentricity of 0.001°. Among them, the longitude of the ascending node of the stars 6, 7, and 8 is 120°E, and the anomaly angle is 120°E. The difference is 120° in turn; the star No. 9 and the star No. 6 are on the same orbital plane, and the star No. 10 and the star No. 7 are on the same orbital plane; the longitude of the ascending node of the stars No. 9 and No. 10 is 100°E, and the difference of the mean anomaly angle is 120° °.

[0047] 4. The constellation service coverage area is 10°N~55°N, 75°E~135°E. User height is 50m. The visible elevation angle of ...

Embodiment 2

[0065] Except the following conditions are different from Example 1, other conditions are the same in this example:

[0066] 1. The user has a requirement to extend the service life of the constellation, but the life extension time has not yet been determined. It is initially estimated that the user constellation life extension time is 2 years.

[0067] 2. Set the satellite reliability change curve as figure 2 shown.

[0068] According to step (2), according to R th1 = 0.70, the life extension time is 2 years, and the Class II reliability threshold R of each satellite at the end of the original life of the constellation can be known th2 = 0.77.

[0069] The initial steps are the same as in Example 1. According to statistics and calculations, determine No. 4 star All other satellites are satisfied and Combining various factors, the on-orbit backup star No. 11 is set at 140°E.

[0070] According to the failure rate parameters, actual failure situation and working...

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Abstract

The invention discloses a navigation constellation satellite backup method, and provides a navigation constellation satellite backup method based on continuity and usability risks of a system. The method comprises the following steps of: fully estimating working reliability, service interrupt probability and interrupt time of constellation satellites and impact on system service in modes of combining a satellite theoretical model with on-orbit data and combining an on-orbit backup strategy with a ground backup strategy; and generating a navigation constellation service performance-oriented satellite backup strategy. By the method, different conditions of prolonging the service life of a constellation are distinguished, the on-orbit backup strategy and the ground backup strategy are comprehensively utilized, the requirements of a user on service precision, continuity and usability of a navigation constellation are met, and the construction cost and maintenance cost of the navigation constellation are well controlled.

Description

technical field [0001] The invention relates to a navigation constellation, in particular to a backup method for a navigation constellation satellite. Background technique [0002] Navigation constellation refers to a satellite system composed of multiple navigation satellites, which realizes a specific spatial geometric configuration and is used to provide navigation and positioning related services. The outstanding feature of the navigation constellation is that multiple satellites work together, and the quality of service depends on the performance of each satellite, the number and spatial distribution of satellites. [0003] During the satellite's in-orbit operation and service provision, in order to maintain its own orbit, it is necessary to implement orbital maneuvering operations on the satellite; in addition, the satellite is restricted by the life and reliability of its own components or components, and is affected by the harsh and changeable space environment , sa...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01S19/03
Inventor 刘家兴崔小准董海青李鹏米红刘崇华陈忠贵
Owner BEIJING INST OF SPACECRAFT SYST ENG
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