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Method of carrying out differential positioning by using GLONASS single frequency signal

A differential positioning, single-frequency signal technology, used in satellite radio beacon positioning systems, measuring devices, instruments, etc., can solve the problem of not being able to guarantee GLONASS positioning accuracy, unable to realize GLONASS positioning alone, etc., to improve accuracy and improve the level of accuracy Effect

Active Publication Date: 2016-06-22
WUHAN GEOSUN NAVIGATION TECH CO LTD
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Problems solved by technology

At present, most positioning software only use GLONASS for auxiliary positioning, that is, after using the accurate positioning results of GPS and Beidou to calculate the GLONASS ambiguity, and then use GLONASS signals for auxiliary positioning to improve the accuracy, it is impossible to achieve independent positioning of GLONASS, and the positioning accuracy of GLONASS cannot be guaranteed.

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  • Method of carrying out differential positioning by using GLONASS single frequency signal
  • Method of carrying out differential positioning by using GLONASS single frequency signal
  • Method of carrying out differential positioning by using GLONASS single frequency signal

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Embodiment Construction

[0016] The technical solution of this patent will be further described in detail below in conjunction with specific embodiments.

[0017] see figure 1 , a method for differential positioning using GLONASS single-frequency signals, the specific steps are as follows:

[0018] Step 1. Calculate the reference satellite single-difference ambiguity by using carrier observations and code pseudorange observations estimated value. Note that the subscript of the receiver is i, and the subscript of the satellite is m, and the carrier phase observation equation is obtained as follows:

[0019]

[0020] (1)

[0021] in Indicates the satellite clock error, Represents the receiver clock error, c represents the speed of light, is the carrier phase observation quantity, is the ambiguity, is the initial phase deviation of the receiver, is the initial phase deviation of the satellite, is the wavelength, is the ionospheric delay, is the tropospheric...

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Abstract

The invention discloses a method of carrying out differential positioning by using a GLONASS single frequency signal. Single positioning can be carried out when only observation data of a GLONASS single frequency L1 are needed, and positioning does not rely on a combined mode with Beidou or GPS. Through difference and ambiguity calculation, a high-precision carrier phase positioning result can be achieved, the precision in a single epoch centimeter level can be achieved after the current ambiguity is fixed, the precision level is improved through short time smoothing, and the GLONASS positioning precision level is greatly improved. The method of the invention also supports combined positioning with Beidou or GPS, and the precision, the reliability and the stability are further improved.

Description

technical field [0001] The invention relates to a differential positioning method, in particular to a differential positioning method using GLONASS single-frequency signals. Background technique [0002] Differential positioning is also called differential GPS technology, that is, a GPS receiver Placed on the base station for observation. According to the known precise coordinates of the base station, the distance correction number from the base station to the satellite is calculated, and the data is sent by the base station in real time. The existing differential positioning methods include GPS and GLONASS. The difference between GLONASS and GPS is that GPS signal processing uses code division multiple access, while GLONASS uses frequency division multiple access, that is, the carriers of different satellites of GPS The phase is the same, but the carrier phase of different GLONASS satellites is different. At present, most positioning software only use GLONASS for auxilia...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S19/41
CPCG01S19/41
Inventor 孙红星范明灿王晖
Owner WUHAN GEOSUN NAVIGATION TECH CO LTD
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