A method and device for determining integer ambiguity

A technology of ambiguity and ambiguity of the entire circle, which is applied in the direction of measuring devices, satellite radio beacon positioning systems, instruments, etc., can solve the problems of insufficient time consumption, complex LAMBDA, and long time, so as to save resources and speed up the search Effect
CN106772474BActive Publication Date: 2019-12-13SPACE STAR TECH CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
SPACE STAR TECH CO LTD
Publication Date
2019-12-13

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Abstract

The invention provides a method and device for determining integer ambiguity, wherein the method includes steps of setting up a carrier wave phase dual-difference observation equation; determining a float solution matrix and a variance-covariance matrix of ambiguities in the carrier wave phase dual-difference observation equation; performing matrix decomposition and decorrelation on the variance-covariance matrix to obtain the ambiguity integral matrix subjected to transformation by a transformation matrix; according to the ambiguity integral matrix, determining a first group of ambiguity candidate solutions for ambiguities, and searching and rounding every ambiguity in the first group of ambiguity candidate solutions in a current searching space to obtain a second group of ambiguity candidate solutions; according to the transformation matrix, reversely transforming two groups of candidate solutions with the minimum norm value to obtain the final integer ambiguity. The method and device for determining integer ambiguity provided herein can reduce the operation complexity and save more resources, thus the method and device are more suitable for searching for high latitude ambiguities with more time consumption.
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Description

technical field

[0001] The invention relates to the technical field of GNSS ambiguity resolution application technology, in particular to a method and device for determining the integer ambiguity. Background technique

[0002] High-precision GNSS (Global Navigation Satellite System, Global Navigation Satellite System) positioning has attracted more and more attention in more and more fields. widely used. High-precision GNSS positioning uses a smooth and less noisy carrier phase for positioning calculation, which is much smaller than the pseudo-range noise error, but it will encounter the problem of integer ambiguity in the carrier phase. The accuracy and speed of carrier phase integer ambiguity search directly affect the results and efficiency of high-precision GNSS positioning. Therefore, it is very important to search for the correct integer ambiguity value as quickly as possible during high-precision GNSS positioning.

[0003] LAMBDA (least-squares Ambiguity Decorrelat...

Claims

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