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Satellite integrity monitoring method and system

An integrity monitoring, satellite technology, applied in the field of satellite positioning, can solve problems such as poor single-point positioning results

Active Publication Date: 2020-05-12
QIANXUN SPATIAL INTELLIGENCE INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, this fault identification method is only suitable for the premise that only one satellite is faulty. If more than two satellites are faulty, even if one faulty satellite is deleted, the single point positioning result is still very poor, so the faulty satellite cannot be identified.

Method used

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  • Satellite integrity monitoring method and system
  • Satellite integrity monitoring method and system

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Embodiment Construction

[0036] In the following description, many technical details are proposed in order to enable readers to better understand the application. However, those skilled in the art can understand that the technical solutions claimed in this application can be realized even without these technical details and various changes and modifications based on the following implementation modes.

[0037] Explanation of some concepts:

[0038] Weight selection iteration: The weight selection iteration method is to re-weight and re-adjust the observations according to the results of the previous iteration in the process of adjustment until the results converge.

[0039] Integrity: Integrity refers to the ability to provide timely warnings to users when the system cannot be used for normal navigation and positioning, or when the system error exceeds the limit.

[0040] Error in unit weight: Observations with weight equal to 1 become unit weight observations. The variance of observations with weig...

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Abstract

The invention relates to a satellite positioning technology, and discloses a satellite integrity monitoring method and system. According to the satellite observation value and the ephemeris obtained by a global navigation satellite system receiver, the integrity system of the satellite is calculated and monitored by adopting a weight selection iterative strategy and a robust estimation method. Thesatellite integrity calculation method has the advantages that when the number of the fault satellites is more than one, monitoring can be carried out, the fault satellites are eliminated. Meanwhile,the calculation efficiency and the calculation accuracy of satellite integrity calculation are effectively improved through the weight selection iterative strategy and the robust estimation method introduced by the satellite integrity calculation method.

Description

technical field [0001] The present application relates to satellite positioning technology, in particular to a satellite integrity monitoring method and system. Background technique [0002] Integrity monitoring technology is divided into three categories: the first is satellite autonomous integrity monitoring technology (SAIM); the second is system internal enhancement technology, that is, using ground reference station reference receiver internal redundant information observations or airborne Other auxiliary information on the system, troubleshooting and monitoring satellite navigation system faults, this method is called on-board receiver autonomous integrity monitoring (Receiver Autonomous Integrity Monitoring, RAIM); the third is the system external enhancement technology, the framework is the ground part The monitoring station monitors the integrity of the satellite broadcast information, the integrity of the data link broadcast and the quality of the ground reference ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S19/20
CPCG01S19/20Y02D30/70
Inventor 王新健
Owner QIANXUN SPATIAL INTELLIGENCE INC
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