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GNSS single-epoch double-difference integer ambiguity rapid determination method

A technology for determining the ambiguity of the whole cycle, which is applied in the satellite radio beacon positioning system, measuring devices, instruments, etc., can solve the problems of uncertainty and the unknown of the ambiguity of the whole cycle, and achieve the purpose of compressing the search space and increasing the sampling rate , The effect of speeding up the calculation efficiency

Active Publication Date: 2020-10-09
BEIJING UNIV OF CIVIL ENG & ARCHITECTURE
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Problems solved by technology

The carrier phase signal is a periodic sinusoidal signal, and the phase measurement can only measure its part less than one wavelength, so there is a problem of integer uncertainty, that is, the problem of integer ambiguity (also called integer unknown)

Method used

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  • GNSS single-epoch double-difference integer ambiguity rapid determination method
  • GNSS single-epoch double-difference integer ambiguity rapid determination method
  • GNSS single-epoch double-difference integer ambiguity rapid determination method

Examples

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Embodiment approach

[0017] According to one embodiment, the predetermined quantity is predetermined to be 5-7 pieces. According to another embodiment, the predetermined number can be determined according to the sampling interval of the GNSS receiver as follows:

[0018]

[0019] Wherein, SatNum is the predetermined number, T is the GNSS receiver sampling interval,

[0020] Where: F is the sampling rate of the GNSS receiver.

[0021] Then, in the double-difference carrier-phase observation equation establishment step of step S20, the double-difference carrier-phase observation equation of the class I satellite pair and the double-difference carrier phase observation equation of the class II satellite pair are established.

[0022] According to one embodiment, in step S20, the double-difference carrier phase observation equation of the class I satellite pair is established as follows:

[0023]

[0024] And the double-difference carrier phase observation equation of the class II satellite ...

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Abstract

The invention relates to a GNSS single-epoch double-difference integer ambiguity rapid determination method. The method comprises the following steps: screening and grading all single-epoch observation satellites into reference satellites, class I satellites and class II satellites; establishing a double-difference carrier phase observation equation of the class I satellite pair and the class II satellite pair; calculating and checking the double-difference integer ambiguity of the class I satellite pair to obtain the double-difference integer ambiguity of the class I satellite pair passing the check, and then calculating the local solution of the class I satellite pair for positioning; substituting the local solution for positioning of the class I satellite pair into a double-difference carrier phase observation equation of a class II satellite pair, and taking an integer to calculate double-difference integer ambiguity of the class II satellite pair; and determining GNSS single-epochdouble-difference integer ambiguity according to the double-difference integer ambiguity of the class I satellite pair and the class II satellite pair.

Description

technical field [0001] The invention relates to a GNSS single-epoch double-difference integer ambiguity rapid determination technology, in particular to the application of a GNSS receiver to the field of safety monitoring of building tower cranes (building construction tower cranes or tower cranes). Background technique [0002] In the field of high-precision satellite positioning, the GNSS carrier phase measurement method is generally used. The carrier phase signal is a periodic sinusoidal signal, and the phase measurement can only measure its part less than one wavelength, so there is a problem of integer uncertainty, that is, the problem of integer ambiguity (also called integer unknown). The rapid determination of the ambiguity of the whole circle is one of the keys to the real-time dynamic positioning of high-precision satellites. [0003] In order to quickly determine the unknowns of the week, workers in this field have made various efforts, developed various methods,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S19/44G01S19/39
CPCG01S19/44
Inventor 周命端
Owner BEIJING UNIV OF CIVIL ENG & ARCHITECTURE
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