Ambiguity fixing method and system based on semi-cycle ambiguity

A technology of fixed ambiguity and full-cycle ambiguity, which is applied in satellite radio beacon positioning systems, radio wave measurement systems, and measurement devices, can solve the problem of reducing RTK use efficiency, unable to achieve full-circle ambiguity fixation, and prolonging RTK initialization time and other issues

Active Publication Date: 2015-09-09
UNICORE COMM INC
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Problems solved by technology

However, in the 6 seconds, due to the possibility of half-cycle ambiguity in the carrier phase observation, the traditional algorithm modeling cannot achieve the fixation of the full-cycle ambiguity, which prolongs the time for RTK initialization and reduces the efficiency of RTK.

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  • Ambiguity fixing method and system based on semi-cycle ambiguity
  • Ambiguity fixing method and system based on semi-cycle ambiguity
  • Ambiguity fixing method and system based on semi-cycle ambiguity

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[0063] In order to facilitate the understanding of those skilled in the art, the present invention will be further described below in conjunction with the accompanying drawings, which cannot be used to limit the protection scope of the present invention.

[0064] In order to realize the fixed resolution of the ambiguity before the polarity judgment of RTK (Real-time kinematic real-time dynamic difference method) and speed up the time of RTK initialization, this paper firstly states the function model of non-difference pseudorange and carrier phase observation. After making differences between aircraft and satellites, the function models of double-differenced pseudorange and carrier phase observations are given. Considering that the carrier phase may have a half-cycle phenomenon before the polarity judgment is completed, a function model-solution model for solving the half-cycle ambiguity is proposed. The ambiguity floating-point solution and its variance and covariance matrix ...

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Abstract

The present invention discloses an ambiguity fixing method and system based on semi-cycle ambiguity. The method comprises establishing a double difference function model based on a predetermined non-difference function model; performing semi-cycle ambiguity solution on the established double difference function model, and converting a semi-cycle-containing ambiguity vector into a whole cycle ambiguity vector through conversion, so as to obtain a resolving model having a fixable whole-cycle double-difference ambiguity vector; and realizing fixation of whole cycle ambiguity according to the resolving model. Through the above scheme, as for the real-time kinematic (RTK) technology, fixation of the ambiguity is completed before polarity judgment is completed, and the RTK initialization time is shortened.

Description

technical field [0001] The present invention mainly relates to the fast fixing technology of the whole-circle ambiguity when the GNSS receiver signal of the global satellite navigation and positioning system is just captured, and in particular to a method and system for fixing the ambiguity based on the half-circle ambiguity. Background technique [0002] Currently, the global satellite navigation and positioning system (GNSS) is composed of GPS in the United States, GLONASS in Russia, BeiDou in China, and Galileo in the European Union. With the development of global satellite positioning technology, the demand for centimeter or even millimeter level positioning accuracy is becoming more and more urgent. GNSS RTK (Real-time kinematic real-time dynamic difference method) technology is still the most important and most commonly used positioning technology to obtain centimeter or even millimeter-level accuracy, and the key point of RTK positioning technology is to fix the ambig...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S19/44
CPCG01S19/44
Inventor 陈孔哲王献中
Owner UNICORE COMM INC
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