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A fast solution method for rtk partial ambiguity in multi-constellation long-baseline network

An ambiguity and long baseline technology, applied in the field of global navigation satellite system satellite positioning, can solve the problem of reducing the probability of correct ambiguity fixation

Active Publication Date: 2017-03-15
SOUTHEAST UNIV
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Problems solved by technology

However, existing studies have shown that as the ambiguity dimension increases sharply, the probability of correct ambiguity fixation will decrease, and it is difficult to successfully fix the ambiguities of all satellites in a short time due to the influence of observation noise and atmospheric residual errors.

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  • A fast solution method for rtk partial ambiguity in multi-constellation long-baseline network
  • A fast solution method for rtk partial ambiguity in multi-constellation long-baseline network
  • A fast solution method for rtk partial ambiguity in multi-constellation long-baseline network

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Embodiment Construction

[0051] The present invention will be further described below in conjunction with the accompanying drawings.

[0052] A method for quickly solving partial ambiguities of multi-constellation long-baseline network RTK, using a three-step solution strategy of wide-lane ambiguity solutions, ionospheric-free ambiguity solutions, and fixed base ambiguities. The partial ambiguity fixation method takes the cut-off satellite altitude angle, ambiguity search prior success rate and Ratio as the main parameters, and realizes fast and accurate fixation of network RTK long baseline ambiguity by optimizing partial ambiguity fixed subsets; including the following specific steps :

[0053] Step 1), using the wide-lane phase to reduce the narrow-lane pseudorange (referred to as M-W combination) method to solve the wide-lane ambiguity between reference stations, including the following specific steps:

[0054] a) For GPS and BDS in code division multiple access signal mode, the M-W combination m...

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Abstract

The invention discloses a quick resolving method for multi-constellation long-base-line network RTK partial ambiguity. After combination of multiple systems, it is hard to obtain accurate integer values of all ambiguities at the same time through resolving due to the influence of observation noise, atmosphere residual errors and other factors; especially for a long base line, the problem is intensified by complexity of atmosphere errors. According to the method, the three-step resolving strategy of wide-lane ambiguity solution, ionized-layer-free ambiguity solution and basic ambiguity fixing is adopted, in the basic ambiguity fixing process, a partial ambiguity fixing method with cut-off satellite elevation, the ambiguity searching prior success rate and Ratio values as main parameters is provided, and quick and accurate fixing of network RTK long-base-line ambiguity is achieved through an optimized partial ambiguity fixing subset. By means of the quick resolving method, the prior success rate and Ratio values can be obviously improved in the ambiguity fixing process, and therefore time needed by ambiguity fixing between network RTK base stations is shortened.

Description

technical field [0001] The invention relates to a global navigation satellite system (GNSS) satellite positioning method, in particular to fast and accurate resolution of ambiguity in a multi-constellation network RTK (Real-Time Kinematic) long baseline. Background technique [0002] With the gradual completion and improvement of the Beidou navigation system, GNSS has entered the era of multi-constellation parallel development. Combined with the established GPS, GLONASS and the Galileo system being developed by the European Union, the number of satellites in orbit of the global satellite navigation system has increased significantly. Relying on multi-constellation, network RTK technology, which has been widely used in the field of GNSS high-precision positioning, is also facing new opportunities and challenges. Multi-constellation observation signals can significantly improve the accuracy and reliability of network RTK user positioning, but its key technology is to quickly ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01S19/44
CPCG01S19/44
Inventor 潘树国高旺高成发胡惠卿尚睿
Owner SOUTHEAST UNIV
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