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Double-frequency multi-constellation GNSS integer ambiguity OTF solving method

It is a technology of whole circle ambiguity and ambiguity, which is applied in satellite radio beacon positioning system, measuring device, instrument, etc. It can solve the problems of incomplete derivation results and errors, and achieve the effect of high work efficiency and simple calculation

Inactive Publication Date: 2014-02-12
SOUTHWEST JIAOTONG UNIV
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Problems solved by technology

However, unlike pseudorange measurement, carrier phase measurement can only measure the part of the carrier phase that is less than one cycle and the number of full cycles accumulated from the initial moment. Therefore, GNSS carrier phase positioning technology has the problem of initial full-cycle ambiguity resolution. That is, there is an unknown integer solution problem for the carrier phase observation value of each frequency of each satellite
Experiments have proved that the FirCAR method can better improve the efficiency of ambiguity resolution, but the derivation results of the previous FirCAR method are incomplete, and some of them have led to wrong conclusions

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Embodiment

[0066] This method improves and supplements the traditional dual-frequency integer-circumference constraint ambiguity algorithm. The improved calculation formula shows that the algorithm can be used for the L1 / L2 signal pair of GPS, and the B1 / B2 and B1 / B3 signal pairs of BDS. , the G1 / G2 signal pair of GLONASS, and the integer ambiguity resolution of the E1 / E5b, E1 / E6 and E5a / E6 signal pairs of GALILEO. The method first calculates the initial integer solution of each ambiguity satellite by satellite by using the pseudo-range observation value and carrier phase observation value, and then combines the dual-frequency phase observation value and the initial integer solution of the ambiguity to constrain the ambiguity by using the improved dual-frequency integer relationship The algorithm fixes the integer ambiguity of each phase observation value satellite by satellite, and then uses the carrier phase observation values ​​of all satellites whose ambiguity has been fixed to perfor...

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Abstract

The invention discloses a double-frequency multi-constellation GNSS integer ambiguity OTF solving method. Under the condition of short base line dynamic positioning, integer ambiguity fixing of a GNSS carrier phase observed value is achieved. The method improves a traditional double-frequency integer relationship constraint ambiguity solving method, and can be suitable for integer ambiguity solving of an L1 / L2 signal pair of a GPS, a B1 / B2 signal pair and a B1 / B3 signal pair of a BDS, a G1 / G2 signal pair of a GLONASS, an E1 / E5b signal pair, an E1 / E6 signal pair and an E5a / E6 signal pair of a GALILEO. Compared with a traditional ambiguity searching method, the double-frequency multi-constellation GNSS integer ambiguity OTF solving method does not need ambiguity searching, and is simple in computing, high in working efficiency and capable of being used for integer ambiguity initialization under a dynamic environment. The double-frequency multi-constellation GNSS integer ambiguity OTF solving method can be widely applied to high precision GNSS real-time dynamic positioning, and particularly has advantages in the integer ambiguity dynamic initialization of multi-GNSS system integrated navigation positioning.

Description

technical field [0001] The invention relates to the technical field of high-precision satellite navigation and positioning, including GPS, BDS, GLONASS and GALILEO navigation satellite systems, in particular to the OTF solution of the initial integer ambiguity in multi-constellation GNSS carrier phase dynamic measurement. Background technique [0002] At present, the four major global navigation satellite systems (GNSS) in the world are the GPS system of the United States, the GLONASS system of Russia, the BDS system (Beidou satellite navigation system) of China, and the GALILEO satellite positioning system of Europe. Due to the characteristics of high precision, global coverage and all-weather positioning, GNSS positioning technology is widely used in surveying and mapping, engineering construction, aerospace, transportation, exploration, timing and marine industries. my country is in the initial stage of the operation and service of the Beidou satellite system, and Beidou ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S19/44
CPCG01S19/44
Inventor 冯威黄丁发周乐韬严丽
Owner SOUTHWEST JIAOTONG UNIV
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