Positioning method based on three-dimension-to-one-direction carrier phase whole cycle ambiguity search

A technology of full-circle ambiguity and carrier phase, which is applied in the field of satellite navigation and positioning, can solve the problems of slow search speed, no further breakthrough and development, and large amount of calculation, so as to achieve accurate and reliable positioning, fast determination of high-precision positioning, The effect of reducing the amount of calculation

Active Publication Date: 2015-12-30
ACAD OF OPTO ELECTRONICS CHINESE ACAD OF SCI
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Problems solved by technology

[0003] The traditional position-based integer ambiguity search method is based on the ambiguity point three-dimensional space search. The advantage of the integer ambiguity search based on the three-dimensional position domain is that it is not sensitive to the entire cycle of the carrier phase. The disadvantage is that the calculat

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  • Positioning method based on three-dimension-to-one-direction carrier phase whole cycle ambiguity search
  • Positioning method based on three-dimension-to-one-direction carrier phase whole cycle ambiguity search
  • Positioning method based on three-dimension-to-one-direction carrier phase whole cycle ambiguity search

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Embodiment Construction

[0027] The present invention will be described in detail below with reference to the accompanying drawings and examples.

[0028] Satellite navigation carrier phase high-precision positioning usually adopts the station-satellite double-difference method, and its linearized carrier-phase double-difference observation equation formula can generally be expressed as formula (2.1):

[0029]

[0030] Among them, u corresponds to the user receiver, c corresponds to the reference station, k corresponds to the reference star, i corresponds to the non-reference star, δx u ,δy u ,δz u Refers to the error correction number of the user's three-dimensional position coordinates, is the double-differenced carrier phase observation, is the integer ambiguity, λ is the carrier phase wavelength (where the wavelength can be the GNSS carrier wavelength, or its ultra-wide-lane, wide-lane combined carrier wavelength), is the double-difference distance from the user to the satellite calculat...

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Abstract

The invention discloses a positioning method based on three-dimension-to-one-direction carrier phase whole cycle ambiguity search. The ambiguity search calculated quantity can be reduced to a large degree, and rapid determination of a whole cycle ambiguity position domain search method is achieved. Meanwhile, according to the method, satellites with large observed quantity errors can be eliminated while whole cycle ambiguity is determined, high-accuracy positioning is completed, and positioning accuracy and reliability are effectively guaranteed. The method can be used for a multi-constellation GNSS compatible system or single system including a GPS, a GLONASS, a Compass, a Galileo and the like, and rapid determination and high-accuracy positioning of the whole cycle ambiguity are achieved.

Description

technical field [0001] The invention relates to the technical field of satellite navigation and positioning, in particular to a positioning method based on carrier phase integer ambiguity search from three-dimensional to one-dimensional. Background technique [0002] Accuracy is one of the important indicators pursued by satellite navigation applications, and the rational use of carrier phase observations is the key to achieving decimeter-level or even centimeter-level high-precision positioning. The solution to the integer ambiguity can be generally divided into four categories: dual-frequency pseudorange method, ambiguity function method, least squares search method and ambiguity covariance matrix method, respectively from the measurement domain, position domain and ambiguity domain Set out to search for a full week of ambiguity. The ambiguity function method based on location domain search is considered to be the earliest OTF method (Hatch et al., 1994). It was first pr...

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Application Information

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IPC IPC(8): G01S19/44
CPCG01S19/44
Inventor 曲江华袁洪赵姣姣周凯欧阳光洲唐阳阳
Owner ACAD OF OPTO ELECTRONICS CHINESE ACAD OF SCI
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