Double-difference ambiguity constraint method, storage medium and device

A double-difference ambiguity and storage medium technology, applied in the field of satellite navigation and positioning, can solve problems such as fixed errors

Active Publication Date: 2021-11-23
广东星舆科技有限公司
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Problems solved by technology

However, in practice, after the ambiguity passes the ratio test, there is still the problem of fixed errors

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  • Double-difference ambiguity constraint method, storage medium and device

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[0018] The technical means or technical effects involved in the present invention will be further described below. Obviously, the provided examples are only some implementations of the present invention, not all of them. All other embodiments that can be obtained by those skilled in the art based on the embodiments of the present invention and the explicit or implied representations of the pictures and texts will fall within the protection scope of the present invention.

[0019] On the general idea, the present invention discloses a double-difference ambiguity constraint method, which includes the following steps: determining the reference ambiguity according to the pre-stored double-difference ambiguity set; monitoring the reference star transformation and / or cycle slip; transformation and / or cycle slip, the double-difference ambiguity that passes the ratio test is output; if no reference star transformation and / or cycle slip occurs, and the double-difference ambiguity that p...

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Abstract

The present invention relates to the field of communication technology, and discloses a double-difference ambiguity constraint method, which determines the reference ambiguity according to the pre-stored double-difference ambiguity set; monitors the reference star transformation and/or cycle slip; if the reference star transformation and/or cycle slip, the double-difference ambiguity that passes the ratio test is output; if no reference star transformation and/or cycle slip occurs, and the double-difference ambiguity that passes the ratio test is equal to the reference ambiguity, output. Accordingly, a storage medium storing a computer program for performing a constrained method of double-difference ambiguity is disclosed. Also disclosed is a double-difference ambiguity generation device. Some technical effects of the present invention are: solving the problem that fixed errors still exist after the ambiguity passes the ratio test.

Description

technical field [0001] The invention relates to the technical field of satellite navigation and positioning, in particular to a double-difference ambiguity constraint method, storage medium and device. Background technique [0002] GNSS integer ambiguity resolution is the core content of centimeter-to-millimeter-level high-precision positioning using carrier phase observations, including two parts: ambiguity estimation and ambiguity confirmation. Among them, the ambiguity estimation is divided into two steps: first, the floating-point ambiguity and its precision information are obtained through the standard least squares solution; then, a certain search algorithm is used to fix the floating-point ambiguity to an integer, which belongs to Integer least squares problem. The ambiguity confirmation is to judge whether the estimated integer ambiguity can be accepted as the correct ambiguity value from the perspective of probability and statistics, which belongs to the problem of...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01S19/44G01S19/42
CPCG01S19/421G01S19/44
Inventor 王浩杜洪伟
Owner 广东星舆科技有限公司
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