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Medium-long baseline ambiguity resolution method based on BeiDou four-frequency signal

A technology of ambiguity and medium and long bases, which is applied in radio wave measurement systems, satellite radio beacon positioning systems, measurement devices, etc.

Inactive Publication Date: 2012-08-29
中国人民解放军61081部队
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Problems solved by technology

[0005] It can be seen that the above methods have certain limitations when applied to GNSS medium and long baseline high-precision measurement

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  • Medium-long baseline ambiguity resolution method based on BeiDou four-frequency signal
  • Medium-long baseline ambiguity resolution method based on BeiDou four-frequency signal
  • Medium-long baseline ambiguity resolution method based on BeiDou four-frequency signal

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Embodiment Construction

[0073] The specific implementation manners of the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0074] Such as figure 1 As shown, the medium and long baseline ambiguity resolution method based on the Beidou four-frequency signal of the present invention includes:

[0075] In step S101, two wide-lane ambiguities are calculated by using the four-frequency combined pseudorange and the four-frequency combined carrier. Such as figure 2 As shown, the specific process is as follows:

[0076] 1. Construct a four-frequency combined pseudorange and a four-frequency combined carrier.

[0077] The observation equations of Beidou pseudo-range and carrier phase are respectively:

[0078] P i = ρ ( ...

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Abstract

The invention discloses a medium-long baseline ambiguity resolution method based on a BeiDou four-frequency signal. The method comprises the following steps of: S1, working out two wide-lane ambiguities by utilizing a four-frequency combination pseudorange and a four-frequency combination carrier; S2, working out the pseudorange of a deionized layer and the delay of a double-difference ionized layer with a frequency point B1 by utilizing the double-difference observed quantities and the corresponding ambiguities of two wide-lane carrier phases; S3, working out two ambiguities related to a fourth frequency according to the pseudorange of the deionized layer and the delay of the double-difference ionized layer with the frequency point B1; and S4, working out the independent ambiguity of a BeiDou four-frequency carrier according to the four ambiguities worked out in the S1-S3. According to the medium-long baseline ambiguity resolution method based on the BeiDou four-frequency signal, under the condition of a medium-long baseline, the independent ambiguity of the four-frequency carrier is rapidly and reliably resolved by adopting the four-frequency combination pseudorange and the four-frequency combination carrier. Compared with a three-frequency method, the ambiguity resolution time is greatly shortened and the ambiguity fixed success rate is effectively increased by the medium-long baseline ambiguity resolution method based on the BeiDou four-frequency signal.

Description

technical field [0001] The invention relates to the technical field of global navigation satellite system (Global Navigation Satellite System, GNSS) high-precision measurement, in particular to a medium-long baseline ambiguity resolution method based on Beidou four-frequency signals. Background technique [0002] GNSS multi-frequency ambiguity resolution is an important part of GNSS high-precision measurement. There are two main modes of ambiguity resolution: geometric mode and no geometry mode. [0003] The LAMBDA method (Least-squares AMBiguity DecorrelationAdjustment) belongs to the geometric mode. Firstly, the search space containing alternative ambiguity combinations is determined, and then the integer transformation and sequential conditional search are performed on the ambiguity search space. Finally, the ambiguity after the integer transformation is optimized. The solution is inversely transformed to obtain the best ambiguity. The LAMBDA method has faster ambiguity...

Claims

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Application Information

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IPC IPC(8): G01S19/29
Inventor 何海波郭海荣王爱兵唐斌张锋章林锋戴弦
Owner 中国人民解放军61081部队
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