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Real-time data stream interruption comprehensive compensation method based on broadcast ephemeris

A technology of broadcast ephemeris and comprehensive compensation, which is applied to satellite radio beacon positioning systems, measuring devices, instruments, etc., and can solve the problems that users cannot achieve continuous high-precision positioning

Active Publication Date: 2020-10-23
SOUTHEAST UNIV
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  • Description
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Problems solved by technology

[0003] Purpose of the invention: The purpose of the invention is to solve the problem that the user cannot achieve continuous high-precision positioning when the real-time data flow is delayed or interrupted

Method used

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  • Real-time data stream interruption comprehensive compensation method based on broadcast ephemeris
  • Real-time data stream interruption comprehensive compensation method based on broadcast ephemeris
  • Real-time data stream interruption comprehensive compensation method based on broadcast ephemeris

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Embodiment Construction

[0042] Below in conjunction with accompanying drawing and specific embodiment, further elaborate the present invention, should be understood that these illustrations are only used to set forth the present invention and do not limit the scope of the present invention, after having read the present invention, to the modification of equivalent form and extended form of the present invention All fall within the scope defined by the appended claims of this application.

[0043] The present invention proposes a comprehensive compensation method for real-time data stream interruption based on broadcast ephemeris, which extracts and weights comprehensive errors including orbital errors, satellite clock errors, and receiver-related errors through regional reference stations, and broadcasts them to users , to ensure that users can still achieve continuous high-precision positioning when the real-time data stream has a large delay or is interrupted.

[0044] 1) Each reference station per...

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Abstract

The invention discloses a real-time data stream interruption comprehensive compensation method based on broadcast ephemeris. A real-time PPP (precise point positioning) needs to receive an orbit and aclock error correction number in real time, and when a real-time data stream is interrupted or large time delay exists, the continuity and reliability of high-precision positioning of a user are difficult to guarantee. To solve the above problem, the method is based on a regional reference station network, the ambiguity of a previous epoch, satellite FCBs (fractional-cyclic biases) and tropospheric delay predicted in a short time are utilized, at the current epoch, the ionosphere-free combination of the broadcast ephemeris is adopted to carry out extraction and weighted modeling on comprehensive errors including orbit errors, satellite clock errors and receiver related errors, and the comprehensive errors are broadcasted to users. When the real-time orbit and the clock error correction number are interrupted or lagged, a user can still adopt broadcast ephemeris and comprehensive errors to replace, and high-precision enhanced positioning is continuously realized.

Description

technical field [0001] The invention relates to a fixed-solution PPP method for comprehensively compensating for real-time data stream interruption by using broadcast ephemeris, and belongs to the technical field of GNSS positioning and navigation. Background technique [0002] The continuous stability of real-time precision products is a key factor affecting the continuity and reliability of PPP positioning. At present, the accuracy of real-time data streams based on broadcast ephemeris state field corrections can meet the positioning accuracy requirements of real-time PPP, but the continuity and stability are relatively low. Poor, and the real-time data stream information has a lag, and there is a certain degree of uncertainty, mainly in the temporary failure of the precise ephemeris generation service system or data interruption or large data delay caused by network delay. Although the satellite orbit correction has a high time-domain correlation, the satellite clock erro...

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Application Information

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IPC IPC(8): G01S19/12G01S19/25G01S19/44G01S19/42
CPCG01S19/12G01S19/256G01S19/44G01S19/421G01S19/258
Inventor 高旺赵庆高成发潘树国
Owner SOUTHEAST UNIV
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