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Network RTK resolving method

A network and solution technology, applied in the field of network RTK solution, can solve the problem of low fixed rate of baseline double-difference integer ambiguity, and achieve the effect of improving the accuracy of the solution, good user experience, and reliable solution.

Active Publication Date: 2019-07-12
QIANXUN SPATIAL INTELLIGENCE INC
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Problems solved by technology

[0020] An object of the present invention is to provide a network RTK solution method to improve the accuracy and reliability of the fixed baseline double-difference integer ambiguity in network RTK, Solve the problem that the fixed rate of the double-differenced integer ambiguity of the baseline in some areas is not high

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[0042] The network RTK solution method of the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0043] figure 1 It is a flowchart of the network RTK solution method of the present invention, such as figure 1 As shown, the network RTK solution method of this example includes:

[0044] Step 1: According to the atmospheric (ionosphere and troposphere) scale factors, the baseline and atmospheric (ionosphere and troposphere) delay model parameters involved in the GNSS network are jointly calculated,

[0045] Jointly calculate various baseline parameters (such as receiver clock error and carrier phase ambiguity) and double-difference atmospheric (current and tropospheric) delay model parameters formed between base stations in the network RTK, that is, use the same The filter simultaneously estimates all baseline parameters and atmospheric parameters. According to the current epoch, use ionospheric and tropospheric scale factors ...

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Abstract

The invention discloses a network RTK resolving method, which combines a baseline resolving module and an atmosphere model module in a conventional network RTK technology together for joint resolving,i.e., all baseline parameters and atmosphere model parameters are simultaneously estimated by using the same filter; and meanwhile, the constraint of a double-difference integer ambiguity closed loopis directly and forcedly applied during joint solution. According to the method, the accuracy and reliability of baseline double-difference integer ambiguity fixation in the network RTK can be improved, and the problem that the network RTK performance is reduced due to the fact that the baseline ambiguity fixation rate of a part of regions is not high is solved.

Description

[0001] This application is a divisional application whose application number is CN201710237878.0, the application date is April 12, 2017, and the invention and creation name is "Network RTK Solution Method". Technical field [0002] The present invention relates to a positioning technology, in particular to a network RTK solution method, which is used to improve the accuracy and reliability of the baseline ambiguity fixation in the network RTK, and solve the problem that the baseline ambiguity fixation rate is not high in some areas. This leads to the problem of performance degradation of network RTK. Background technique [0003] One of the main sources of errors in the Global Navigation Satellite System (GNSS) in satellite positioning is the additional atmospheric delay caused by atmospheric refraction when the satellite signal propagates from the satellite to the receiver. The atmospheric delay mainly includes the ionosphere and Ionospheric delay and tropospheric delay caused b...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S19/23G01S19/29G01S19/37
CPCG01S19/235G01S19/29G01S19/37
Inventor 何锡扬崔红正
Owner QIANXUN SPATIAL INTELLIGENCE INC
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