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A method supporting pseudo-range differential positioning of different-frequency GNSS signals

A pseudo-range differential and signal technology, which is applied in the field of satellite navigation and positioning, can solve problems such as the inability to correct differential signals of navigation satellite signals of different frequencies, and achieve the effects of improving stability and reliability, ensuring effective use, and saving use costs

Active Publication Date: 2021-05-25
中国北方工业有限公司 +1
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Problems solved by technology

[0004] The technical problem to be solved by the present invention is how to provide a method that supports pseudo-range differential positioning of different frequency GNSS signals, so as to overcome the problem that the traditional pseudo-range differential positioning method cannot perform differential correction between navigation satellite signals of different frequencies

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  • A method supporting pseudo-range differential positioning of different-frequency GNSS signals
  • A method supporting pseudo-range differential positioning of different-frequency GNSS signals
  • A method supporting pseudo-range differential positioning of different-frequency GNSS signals

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[0017]In order to make the objects, content, and advantages of the present invention, specific embodiments of the present invention will be further described in detail below with reference to the accompanying drawings and examples.

[0018]Traditional pseudorange differential positioning technology only uses the geometric distance between the pseudorange observation and the geometric distance between the reference station and the satellite, and the pseudorange distance obtained by the traditional pseudorange distance is correct. The integrated number of presses the observation value, which includes many errors such as satellite orbit error, satellite clock, ionospheric delay error, on-flow layer delay error, signal hardware delay error (TGD), relativity effect, multi-path effects. The proposed universal pseudo-distance differential positioning technique proposed in the present invention removes the error term associated with the signal frequency of the ionosphere delay error and the si...

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Abstract

The invention relates to a method for supporting pseudo-range differential positioning of different-frequency GNSS signals, and belongs to the technical field of satellite navigation and positioning. In order to overcome the problem that the traditional pseudorange differential positioning method cannot perform differential corrections between navigation satellite signals of different frequencies, the present invention enables the reference station to calculate the pseudorange difference correction number and the mobile station to calculate the corrected pseudorange value. The ionospheric delay error item and the on-board equipment delay error item TGD related to the frequency of the GNSS signal are calculated, so that the pseudo-range difference correction number broadcast by the base station and the pseudo-range value calculated by the rover are independent of frequency, and the rover uses the pseudo-range After the observation value is added to the pseudo-range differential correction number and the ionospheric delay error and on-board equipment delay error are eliminated, the corrected pseudo-range value is calculated for pseudo-range differential positioning. Therefore, it supports pseudo-range differential positioning between GNSS signals of different frequencies, ensures that different carrier signals can still be positioned, improves the stability and reliability of pseudo-range differential positioning, and saves use costs.

Description

Technical field[0001]The present invention belongs to the field of satellite navigation positioning technology, which relates to a method of supporting differential gnss signal pseudorange differential positioning.Background technique[0002]Since the 1970s, satellite navigation positioning technology has gradually emerged. After more than 40 years of technology development, satellite navigation positioning technology gradually matures. Among them, the navigation of satellite navigation is widely used in various industries due to high precision, all-weather, stability, and so on. At present, conventional satellite navigation positioning accuracy is around 10 meters, using a pseudo distance differential positioning technology, and its positioning accuracy can be increased to 1 meter. Unlike conventional satellites navigation positioning, pseudo-distance differential positioning techniques need to have a reference station with a known point to provide a pseudo distance differential modi...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01S19/42G01S19/41
CPCG01S19/41G01S19/42
Inventor 林蔚王进冯灿甄灵王亮亮孙春然汤深权高照锋惠孟堂王琛琛蒋虎李哲
Owner 中国北方工业有限公司
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