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Satellite integrity monitoring method and system based on mutual deviation

An integrity monitoring, satellite technology, applied in the field of satellite monitoring, can solve the problems of low accuracy, many constraints, complex calculation process, etc., to achieve the effect of reducing positioning error and ensuring positioning accuracy

Active Publication Date: 2014-07-23
GUILIN UNIV OF ELECTRONIC TECH
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Problems solved by technology

The pseudo-range comparison method requires at least 5 currently visible satellites, and the integrity of the satellites is analyzed according to the error between the observed pseudo-range and the actual distance, with poor stability and low accuracy; the least square residual method and the odd-even space method are mathematically The principle is the same, and at least 5 currently visible satellites are also required, but the calculation process of the two is more complicated, and there are too many constraints

Method used

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  • Satellite integrity monitoring method and system based on mutual deviation
  • Satellite integrity monitoring method and system based on mutual deviation
  • Satellite integrity monitoring method and system based on mutual deviation

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Embodiment Construction

[0018] In order to better understand the present invention, the present invention will be further described in detail below through the accompanying drawings and examples.

[0019] A kind of satellite integrity monitoring method based on mutual difference provided by the present invention, concrete steps are as follows:

[0020] 1. Calculation of satellite position, clock error and geometric distance between satellite and receiver: use dual-frequency positioning receiver to calculate the spatial position and clock error δt of all visible satellites in the current epoch s , calculate the geometric distance r between the visible satellite and the receiver based on the known precise surveying position of the receiver.

[0021] 2. Calculation of atmospheric delay and hardware channel delay: use dual-frequency receiver to obtain visible satellite B1, B2 frequency point pseudo-range and satellite hardware channel delay T gd , using the B1 frequency point pseudorange to calculate th...

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Abstract

The invention discloses a satellite integrity monitoring method and system based on mutual deviation. The method includes the steps of resolving the satellite position, clock correction and the geometrical distance between a satellite and a receiver, calculating atmospheric layer retardation and hardware channel retardation, calculating the pseudo-range deviation value, constructing the mutual deviation datum quantity, establishing the detection quantity and judging the integrity of the satellite. By means of the satellite integrity monitoring method and system based on mutual deviation, breakdown satellites can be accurately detected in time, the positioning result of a user is kept within the range of four to eight meters all the time, the positioning error of the user is effectively lowered, and the positioning accuracy of the user is guaranteed.

Description

technical field [0001] The invention relates to the technical field of satellite monitoring in a satellite navigation system, in particular to a satellite integrity monitoring method and system based on mutual difference. Background technique [0002] Satellite integrity monitoring technology is of great significance in the field of dynamic and precise navigation. Scholars at home and abroad have carried out a lot of related research on satellite integrity monitoring, among which receiver autonomous integrity monitoring plays an important role in satellite integrity monitoring methods. At present, the autonomous integrity monitoring of receivers mainly uses satellite redundant observation pseudoranges to judge the integrity information of satellites. The main methods include pseudorange comparison method, least square residual method and odd-even space method. The pseudo-range comparison method requires at least 5 currently visible satellites, and the integrity of the satel...

Claims

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Application Information

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IPC IPC(8): G01S19/20
CPCG01S19/20
Inventor 蔡成林邓克群李思敏邓仕超韦照川李志斌
Owner GUILIN UNIV OF ELECTRONIC TECH
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