Satellite selection method for improving RTK positioning precision

A technology for positioning accuracy and star selection, applied in satellite radio beacon positioning systems, measuring devices, instruments, etc., can solve problems such as the unsatisfactory RTK effect, and achieve the effect of accelerating convergence speed, obvious effect, and improving positioning accuracy.

Active Publication Date: 2017-03-29
MINJIANG UNIV +1
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Problems solved by technology

[0004] However, for dynamic real-time deformation monitoring such as landslide disasters, the effect o

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  • Satellite selection method for improving RTK positioning precision
  • Satellite selection method for improving RTK positioning precision
  • Satellite selection method for improving RTK positioning precision

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[0034] In order to make the purpose, technical solution and advantages of the present invention more clear, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, and do not limit the protection scope of the present invention.

[0035] combine figure 2 , give the present invention a kind of optimal embodiment of the star selection method that improves RTK positioning accuracy: use the 24-hour IGS site jfng (China-Jiufeng) on ​​January 1, 2016 as the base station (true value coordinate accuracy reaches 2mm ), wuh (China - Wuhan) as a mobile station

[0036] (True coordinate accuracy reaches 3mm) for testing, the epoch interval is 30s, and the GNSS (Global Navigation Satellite System) system included in the data is only GPS (Global Position System). For the 720th epoch:

[0037] (1) The nu...

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Abstract

The invention discloses a satellite selection method for improving RTK positioning precision and belongs to the field of RTK positioning of a global satellite navigation system. According to method provided by the scheme, after a reference satellite is selected through an elevation angle, a dual-difference residual error threshold is set, phase pseudo range dual-difference residual errors are calculated for the reference satellite and each common satellite, and satellite selection is carried out according to value sizes. According to the scheme, the computational complexity is quite small, the threshold of the dual-difference residual errors can be dynamically adjusted according to different phases in an RTK positioning process, the convergence speed of the RTK positioning is accelerated, the RTK positioning precision is further improved, and the method has great significance on such application occasions with ever improving precision requirements as landslide detection and the like.

Description

technical field [0001] The invention relates to the field of RTK positioning of a global satellite navigation system, in particular to a satellite selection method for improving RTK positioning accuracy. Background technique [0002] As an emerging technology, satellite global positioning system is widely used in military, navigation scheduling, geological exploration, surveying and mapping, development and other fields. Positioning includes single-point positioning and RTK (Real-Time Kinematic) positioning. In fields with high precision requirements such as geodetic surveying or engineering surveying, RTK positioning is usually used to ensure a certain degree of accuracy. [0003] The previous static, fast static, and dynamic measurements all required post-processing to obtain centimeter-level accuracy, while RTK can provide real-time three-dimensional positioning results of the station point in the specified coordinate system, and achieve centimeter-level or even millimete...

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Application Information

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IPC IPC(8): G01S19/28
CPCG01S19/28
Inventor 樊春明商云鹏管庆林彭飞朱正平林炳陈光永
Owner MINJIANG UNIV
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