Method for dynamically determining integer ambiguity in RTK (real-time kinematic) positioning

A technology for determining the ambiguity and dynamics of the entire circle, which is applied in satellite radio beacon positioning systems, measuring devices, instruments, etc., can solve the problems of complex process of determining ambiguity and large amount of calculation, so as to increase reliability and improve accuracy , the effect of shortening the time

Active Publication Date: 2017-01-11
MINJIANG UNIV +1
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Problems solved by technology

However, this invention has problems such as too much calculation and the process of determining the ambiguity is relatively complicated.

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  • Method for dynamically determining integer ambiguity in RTK (real-time kinematic) positioning
  • Method for dynamically determining integer ambiguity in RTK (real-time kinematic) positioning
  • Method for dynamically determining integer ambiguity in RTK (real-time kinematic) positioning

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[0040] 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.

[0041] combine figure 1 , provide the optimal embodiment of the dynamic determination method of the integer ambiguity in the RTK positioning of the present invention, comprising the following steps:

[0042] (1) Each epoch independently solves the floating-point solution and the corresponding covariance matrix of the integer ambiguity;

[0043] (2) Carry out the whole week ambiguity search to obtain a set of ambiguities of all satellites in the i-th epoch And an indicator that characterizes the reliability of the ambiguity of the i-th epoch——Ratio i value, j is t...

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Abstract

The invention discloses a method for dynamically determining integer ambiguity in RTK (real-time kinematic) positioning and belongs to the field of global satellite navigation system RTK positioning. After ambiguity and Ratio value are searched out by using LAMBDA method, a threshold is set dynamically according a stage of RTK positioning process; if both Ratio value and accumulative Ratio value of an ambiguity combination currently resolved via epoch are greater than the corresponding set threshold, it is determined that the ambiguity combination is correct. The method of the invention enables ambiguity misjudgment and judgment omission to be effectively avoided, ambiguity determining reliability is improved, time to converge to a fixed solution in RTK positioning can be shortened, and RTK positioning precision can be improved.

Description

technical field [0001] The invention relates to the field of RTK positioning of a global satellite navigation system, in particular to a method for dynamically determining the integer ambiguity in RTK positioning. 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 reason why RTK positioning can ensure a certain accuracy is because it mainly uses the carrier phase with high accuracy. However, there is ambiguity in carrier phase measurement, and ambiguity is an unknown fixed preconceived value. Once the ambiguity of the whole cycle is determin...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S19/44
CPCG01S19/44
Inventor 樊春明商云鹏管庆林朱正平彭飞林炳陈光永
Owner MINJIANG UNIV
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