Three-frequency ambiguity solution method for Beidou precise point positioning

A precise single-point positioning and ambiguity technology, which is applied in the field of Beidou satellite navigation and positioning, and can solve problems such as inaccurate floating-point solutions.

Active Publication Date: 2019-10-18
GUANGXI UNIV +1
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Problems solved by technology

Floating-point solutions a

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  • Three-frequency ambiguity solution method for Beidou precise point positioning
  • Three-frequency ambiguity solution method for Beidou precise point positioning
  • Three-frequency ambiguity solution method for Beidou precise point positioning

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[0054] The present invention will be further described in detail below in conjunction with the accompanying drawings, so that those skilled in the art can implement it with reference to the description.

[0055] It should be understood that terms such as "having", "comprising" and "including" as used herein do not entail the presence or addition of one or more other elements or combinations thereof.

[0056] It should be noted that the experimental methods described in the following embodiments, unless otherwise specified, are conventional methods, and the reagents and materials, unless otherwise specified, can be obtained from commercial sources.

[0057] The frequencies used for GNSS navigation and positioning are composed of reference frequencies, and the reference frequency of the Beidou system is f 0 , then the frequency of each frequency point can be expressed as

[0058] f i =a i f 0 (1)

[0059] Select three frequencies of the Beidou system, B1I (1561.098MHz), B2...

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Abstract

The invention discloses a three-frequency ambiguity solution method for Beidou precise point positioning. The three-frequency ambiguity solution method for Beidou precise point positioning comprises the steps of: (1), obtaining the floating point ambiguity of the first EWL by using a HMW combination, obtaining a fixed solution after rounding, and obtaining a high-precision observation value; (2),introducing two pseudo-distance combination observation values, setting a constraint condition by using the first high-precision extra-wide-lane observation value and the two pseudo-distance observation values at the same time, obtaining the floating point ambiguity of the second EWL, and obtaining a fixed solution after rounding; (3), performing linear combination by using the two high-precisionEWL fixed solutions so as to obtain the WL combined fixed ambiguity, and obtaining the WL high-precision observation value; and (4), setting a constraint condition by using a wide-lane observation value and a pseudo-distance observation value at the same time, so that an NL combined ambiguity is obtained. The three-frequency ambiguity solution method for Beidou precise point positioning in the invention analyzes signals in three frequencies of B1I, B2a and B3I; the high-precision floating point solution is obtained; therefore, the rounded fixed solution can have relatively high precision; andthus, a reliable locating result can be obtained.

Description

technical field [0001] The invention relates to Beidou satellite navigation and positioning technology. More specifically, the present invention relates to a three-frequency ambiguity resolution method that can be used for Beidou precise single point positioning. Background technique [0002] With the modernization of the Beidou Satellite Navigation System (BDS), satellites gradually began to provide tri-frequency or even multi-frequency signals. The emergence of multi-frequency signals has greatly promoted the development of ambiguity resolution (AR) and precise point positioning (PPP) technologies. Compared with relative positioning, PPP does not require a reference station and has advantages in terms of efficiency, cost-effectiveness and mobility. Therefore, in the fields of geodesy, low-orbit satellite orbit determination, and high-precision navigation and positioning, precision single-point positioning technology has been more and more applied. PPP technology has gra...

Claims

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Application Information

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IPC IPC(8): G01S19/44
CPCG01S19/44
Inventor 覃团发蔡舒胡永乐王中豪沈湘平刘宇罗剑涛官倩宁陈哲李孟恒李金泽
Owner GUANGXI UNIV
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