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

A satellite ephemeris and fault monitoring technology, applied in radio wave measurement systems, satellite radio beacon positioning systems, measurement devices, etc., can solve problems such as limited monitoring efficiency, and achieve the effect of improving monitoring efficiency

Active Publication Date: 2019-03-08
HARBIN ENG UNIV
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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

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

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Embodiment Construction

[0031] The present invention will be further described below in conjunction with the accompanying drawings.

[0032] as attached figure 1 As shown, it is a flow chart of the satellite ephemeris fault monitoring technology based on the short baseline multi-reference receiver of the present invention.

[0033] Step 1, construct the test statistic of ephemeris fault detection;

[0034] For a faulty satellite i and a non-faulty satellite j, reference receivers m and n, inter-satellite phase observations are double-differenced can be expressed as:

[0035]

[0036] in is the cosine single difference of inter-satellite direction, b mn is the baseline vector, and are the double-differenced ionosphere and troposphere, respectively, is the double-difference ambiguity, λ is the wavelength, and ε is the observation noise. When the double-difference ambiguity can be reliably resolved, the test statistic t for ephemeris fault detection can be constructed as:

[0037]

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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...

Claims

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Application Information

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IPC IPC(8): G01S19/23
CPCG01S19/23
Inventor 李亮刘晓嵩杨福鑫程建华赵琳
Owner HARBIN ENG UNIV
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