Satellite ephemeris fault monitoring method based on short-base-line multi-reference receiver

Abstract

The invention aims to a satellite ephemeris fault monitoring method based on short-base-line multi-reference receiver and having high monitoring efficiency. The satellite ephemeris fault monitoring method comprises the steps that 1, the test statistic amount of ephemeris fault detection is constructed; 2, ambiguity is calculated; 3, false alarm errors are controlled; 4, leak detection errors are controlled. Navigational satellite signals are synchronously received and processed through the multi-reference receiver under short-base-line configuration, multi-reference consistency monitoring of satellite ephemeris faults is carried out through carrier wave phase differential positioning of the multi-reference receiver, and integrity monitoring is carried out according to preset required navigation performance. Compared with a single-reference receiver, more permissive detection threshold values can be obtained by the multi-reference receive and are conductive to the continuity risk in integrity monitoring. In addition, the influence of atmospheric propagation errors of an ionized layer, a troposphere and the like on the satellite ephemeris fault monitoring performance can be avoided by adopting the multi-reference receiver, and the monitoring efficiency is improved.

Description

technical field [0001] The invention belongs to the field of satellite ephemeris fault monitoring, in particular to a satellite ephemeris fault monitoring method based on a short baseline multi-reference receiver. Background technique [0002] For many safety-critical navigation applications, the effects of satellite ephemeris failures must be monitored. In Receiver Autonomous Integrity Monitoring (RAIM), Ground-Based Augmentation Systems (GBAS) and Satellite-Based Augmentation Systems (SBAS), ephemeris failures must be monitored to prevent excessive position errors and loss of availability in integrity monitoring. [0003] The ephemeris faults of GPS satellites can be divided into two types, A and B, according to whether they are related to satellite maneuvering. For Class B satellite failures, no satellite maneuvers are involved, but the abnormal ephemeris broadcast by navigation satellites will produce a large error in the satellite position during the propagation proces...

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Problems solved by technology

However, the implementation of this type of method is mainly based on the GBAS framework, and its purpose is to monitor the influence of satellite ephemeris faults on the accuracy of differential correction. Therefore, this type of monitoring method also needs to avoid atmospheric propagation errors, such as ionospheric and tropospheric storms. The impact of historical fault monitoring performance, the efficiency of monitoring is also limited

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