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Non-combined RTK positioning method based on Beidou III satellite four-frequency observation value

A technology of Beidou-3 and positioning method, which is applied in satellite radio beacon positioning system, measuring device, radio wave measuring system, etc., can solve the problems of reducing the utilization rate of observation values, improve position service and time synchronization ability, save The effect of manpower and accuracy improvement

Inactive Publication Date: 2019-07-12
STATE GRID ZHEJIANG ELECTRIC POWER +1
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Problems solved by technology

More importantly, the current non-integrated RTK methods all use reference satellites of corresponding frequency points, thereby reducing the utilization rate of observations

Method used

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  • Non-combined RTK positioning method based on Beidou III satellite four-frequency observation value
  • Non-combined RTK positioning method based on Beidou III satellite four-frequency observation value
  • Non-combined RTK positioning method based on Beidou III satellite four-frequency observation value

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Embodiment Construction

[0039] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0040] Please refer to the accompanying drawings of the description, the present invention provides a technical solution: a non-combined RTK positioning method based on the four-frequency observations of the Beidou No. 3 satellite, comprising the following steps:

[0041] Step 1: The monitoring point receives the pseudorange and phase observation values ​​of the four frequency points of the Beidou-3 satellite at the monitoring point through the receiver;

[00...

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Abstract

The invention discloses a non-combined RTK positioning method based on Beidou III satellite four-frequency observation value, which comprises following steps that: step1,a monitoring point is used toreceive pseudo ranges and phase observed values of four frequency points of a Beidou satellite III from a monitoring point by a receiver; step 2, the data acquired in the step 1 and ionospheric grid data released by CNES in the step 1 are transmitted to a server; step 3, the differential positioning of the two data acquired in the step 2 are carried out; step 4, an inter-station single differenceobservation equation of B3I frequency points is additionally provided, and the ionospheric value acquired by calculation through grid data released by CNES to constrain the ionosphere; step 5, Kalmanfiltering is used to estimate parameters, and double-difference ambiguity is fixed to acquire the displacement variation of the monitoring point and a time difference between the monitoring point andthe mobile station; step6, the data acquired in the step 5 is recorded in a data center, early warning is carried out according to a pre-safety threshold, and at the same time, the time difference data between the monitoring point and the mobile station is transmitted to the server, and then the time is automatically calibrated by the server.

Description

technical field [0001] The invention relates to a differential positioning method based on the four-frequency observation values ​​of the Beidou-3 (BDS-3), in particular to a non-combined RTK positioning method based on the four-frequency observation values ​​of the Beidou-3 satellite. Background technique [0002] At present, there are many mature ambiguity fixing methods for dual-frequency single-epoch relative positioning of satellite positioning at home and abroad. Epoch solution method for GPS integer ambiguity, etc. With the development of China's BDS-3 satellite, BDS-3 is a current and future research hotspot. Compared with the Beidou-2 (BDS-2) satellite, BDS-3 broadcasts signals of five frequency points (the four frequency points are B1I, B3I, B1C and B2a), which brings BDS-3 satellite multi-frequency differential positioning Greater opportunities and challenges. BDS-3 satellite multi-frequency single-epoch positioning is a new method of rapid positioning. Because...

Claims

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Application Information

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IPC IPC(8): G01S19/44
CPCG01S19/44
Inventor 张文杰吴秋晗杨鸿珍贺琛王志强邵炜平储建新熊佩华陈国栋何灿国
Owner STATE GRID ZHEJIANG ELECTRIC POWER
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