A system-level single-event monitoring and protection method for a spaceborne GPS receiver

Abstract

The invention provides a system-level single event monitoring and protecting method for a satellite-borne GPS receiver. After receiving an 'enable' state of an autonomous monitoring function, a satellite-borne computer monitors the working state of a satellite-borne GPS receiver; if the working state is normal, the satellite-borne computer continuously monitors (1) whether the TIC count value of the satellite-borne GPS receiver changes in a first preset time; if the TIC count value changes in the first preset time, the satellite-borne computer monitors (2) whether the orbit determination data valid markers of the satellite-borne GPS receiver are all 'valid' in a second preset time; if the orbit determination data valid markers are all 'valid' in the second preset time, the satellite-borne computer monitors (3) whether the autonomous monitoring state of the satellite-borne GPS receiver is 'normal' for multiple consecutive times; and if any of (1) to (3) is not satisfied, the satellite-borne GPS receiver is restarted, and thus, the influence of single event upset on the satellite-borne GPS receiver is eliminated. The method improves the anti-single-event performance of satellite-borne GPS receivers from the system level, and effectively realizes single event monitoring and protecting for satellite-borne GPS receivers.

Description

technical field [0001] The invention relates to a system-level single-event monitoring and protection method for a satellite-borne GPS receiver, and is especially suitable for the satellite-borne GPS receiver of a low-orbit satellite to cope with the fault of being overturned by a single particle. Background technique [0002] The operating environment of my country's low-orbit remote sensing satellites is greatly affected by single particles, and abnormal operation of equipment is prone to occur. This situation can be resolved by restarting the equipment. At present, the monitoring and protection measures of the working status of spaceborne GPS receivers mainly rely on ground monitoring and control stations, which are limited to controllable arcs. Due to the orbital height of low-orbit remote sensing satellites and the regional limitations of measurement and control stations, the controllable arc is very limited, and failures that occur outside the arc cannot be monitored i...

AI Technical Summary

Problems solved by technology

[0004] The problem solved by the technology of the present invention is: to overcome the deficiencies of the existing methods, aiming at low-orbit satellites, solve the problem that the existing device-level and equipment-level single-particle monitoring and protection measures have limited processing capabilities for single-particle effects, and provide a Measures to improve the anti-single event performance of spaceborne GPS receivers from a system-level perspective, and effectively realize the autonomous shutdown and restart operations of spaceborne GPS receivers

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