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BDS2/BDS3 combined precise single-point positioning method and device

A precise single-point positioning and observation equation technology, applied in the field of satellite positioning, can solve the problems of poor positioning accuracy and convergence, small number of MEO satellites, poor orbit determination accuracy, etc., to achieve the effect of ensuring accuracy and continuity

Pending Publication Date: 2020-10-02
PLA STRATEGIC SUPPORT FORCE INFORMATION ENG UNIV PLA SSF IEU
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AI Technical Summary

Problems solved by technology

[0003] The Beidou-2 space constellation is mainly composed of 5 GEO satellites, 5 IGSO satellites and 3 MEO satellites. Because the orbits of GEO satellites and IGSO satellites are relatively high, the orbit determination accuracy is poor. In ), the weight of these two types of satellite observations is often reduced or discarded, but the number of MEO satellites in BDS2 is small, so the positioning accuracy and convergence of Beidou PPP are worse than GPS

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  • BDS2/BDS3 combined precise single-point positioning method and device
  • BDS2/BDS3 combined precise single-point positioning method and device
  • BDS2/BDS3 combined precise single-point positioning method and device

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Embodiment Construction

[0022] The specific embodiments of the present invention will be further described below in conjunction with the accompanying drawings.

[0023] method embodiment

[0024] By modeling BDS3 and BDS2 into the same type of system, assigning different weights to different types of satellites, and automatically identifying the same pseudo-range and carrier phase observations received by the two types of satellite navigation systems, BDS3 and BDS2, and jointly performing positioning solutions The calculation ensures the accuracy and continuity of precise single point positioning. Its implementation process is as follows figure 1 As shown, the specific process is as follows.

[0025] 1. Get the signal of BDS2 and BDS3.

[0026] The acquired signals include BDS2 and BDS3 observation files, as well as precise ephemeris files, earth autobiography files and satellite antenna files.

[0027] The observations contained in the observation files of BDS3 and BDS2 are shown in Table 1.

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Abstract

The invention relates to a BDS2 / BDS3 combined precise single-point positioning method and device, and belongs to the technical field of satellite positioning. The principle of compatibility and sharing is adopted, and joint positioning is carried out by utilizing signals shared by two types of satellite positioning systems; for a specific signal of one of the two types of satellite positioning system, an ionosphere elimination PPP model is independently adopted for calculation, and independent positioning is carried out; and weighted fusion is performed on the two results, and the fused positioning result is the final positioning result. Signals of the two types of satellite positioning systems are fully utilized, so the precision and continuity of precision single-point positioning are guaranteed.

Description

technical field [0001] The invention relates to a precise single-point positioning method and device combined with BDS2 / BDS, belonging to the technical field of satellite positioning. Background technique [0002] BeiDou Navigation Satellite System (BDS) is a satellite navigation system independently developed and operated independently in my country, which can provide real-time and high-precision three-dimensional position and speed for the majority of users. , weapons and equipment and other fields play an irreplaceable role. The construction of the Beidou satellite navigation system follows the "three-step" strategy. At the end of 2012, the construction of the Beidou-2 (BDS2) system was completed and provided RNSS services and RDSS services in the Asia-Pacific region. In June 2020, the last Beidou-3 (BDS3) networking satellite will be launched. By then, all Beidou-3 satellites will be launched and will provide global satellite navigation and positioning, timing services, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S19/32G01S19/42
CPCG01S19/32G01S19/42
Inventor 何劢航孙付平肖凯朱新慧张伦东张耀春
Owner PLA STRATEGIC SUPPORT FORCE INFORMATION ENG UNIV PLA SSF IEU
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