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Beidou three-frequency signal carrier phase whole cycle ambiguity single epoch determining method

A technology of whole cycle ambiguity and carrier phase, which is applied in satellite radio beacon positioning systems, radio wave measurement systems, instruments, etc., and can solve the problems of low reliability, short baseline, and low ambiguity efficiency.

Active Publication Date: 2014-03-26
SPACE STAR TECH CO LTD
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Problems solved by technology

[0003] The technical problem of the present invention is to overcome the shortcomings of low efficiency, short baseline and low reliability in the dual-frequency dynamic determination of ambiguity in the prior art, and propose a method for determining the ambiguity of the entire cycle of the Beidou triple-frequency signal carrier phase with a single epoch. Using a new level-by-level fixed method, each step of the solution is optimized accordingly to ensure that the station can obtain a highly reliable integer ambiguity in the case of a single epoch

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  • Beidou three-frequency signal carrier phase whole cycle ambiguity single epoch determining method
  • Beidou three-frequency signal carrier phase whole cycle ambiguity single epoch determining method
  • Beidou three-frequency signal carrier phase whole cycle ambiguity single epoch determining method

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Embodiment Construction

[0054] A single epoch determination method for the carrier phase ambiguity of the Beidou tri-frequency signal. Based on a geometrically independent model, each combined ambiguity is determined step by step, and the single-epoch solution of the carrier phase ambiguity of the tri-frequency signal is completed. The step-by-step distribution steps are as follows:

[0055] Step 1: According to the baseline length, wavelength, and ionospheric magnification, determine the double-difference observation model of the Beidou triple-frequency combination carrier phase. The double-difference observation model of the Beidou triple-frequency combination carrier phase is written as:

[0056] ▿ Δ Φ C = α ▿ Δ Φ 1 + β ▿ Δ Φ 2 + γ ▿ Δ Φ ...

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Abstract

The invention discloses a Beidou three-frequency signal carrier phase whole cycle ambiguity single epoch determining method. On the basis of the a geometry irrelevant model, the ambiguity of all the combinations are determined step by step through the matching of determination of a Beidou three-frequency combined model, the calculating of a three-frequency super wide combination ambiguity single epoch, the calculating of optimized wide item ambiguity, and the calculating of optimized narrow item ambiguity, and the calculating of the three-frequency signal ambiguity single epoch is completed. According to the method, on the aspect of the three-frequency ambiguity calculation, a LAMBDA method highest in ambiguity calculating success rate is adopted and is improved, so that the single epoch searching success rate is further improved. The method is higher in fixed ambiguity efficiency, and can be better applied in real-time dynamic environments.

Description

technical field [0001] The invention relates to a method for fixing a single epoch of ambiguity, in particular to a method for determining a single epoch of ambiguity for the entire circle of the Beidou tri-frequency signal carrier phase, which can be used for positioning in a satellite navigation system. Background technique [0002] The RTK system can provide real-time centimeter-level positioning for end users, and the real-time and fast resolution of the ambiguity of the entire circumference of the reference station is one of the core key issues to ensure that the system achieves high-precision dynamics. At present, RTK technology has been popularized and applied. As the global satellite navigation system gradually enters a new era of multi-frequency and multi-system joint positioning, the single GPS RTK mode is gradually replaced by multi-frequency and multi-mode GNSS RTK. The invention realizes the method of fixing the ambiguity of the entire cycle in the single epoch ...

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Application Information

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IPC IPC(8): G01S19/04G01S19/44
CPCG01S19/04G01S19/44
Inventor 董荣省曹潇侯春青杨光魏玉峤
Owner SPACE STAR TECH CO LTD
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