GNSS three-frequency combination cycle slip detection and restoration method without blind spots
A triple-frequency combination and cycle-slip detection technology, which is applied in the field of satellite navigation and positioning, can solve problems such as detection blind spots, and achieve the effects of eliminating receiver clock error, good detection effect, and good repair effect
Active Publication Date: 2020-06-05
SOUTHEAST UNIV
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Problems solved by technology
Aiming at the problem that the current triple-frequency combination method is prone to detection blind spots for special cycle-slip combinations, the present invention provides a GNSS triple-frequency combination cycle-slip detection and repair method without blind spots, which overcomes the limitation of detection blind spots in the existing triple-frequency combination method Higher accuracy, stability and detection precision
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[0056] Below in conjunction with accompanying drawing and specific embodiment the present invention is described in further detail:
[0057] The invention provides a GNSS tri-frequency combination cycle slip detection and repair method without blind spots. The method is suitable for multi-system tri-frequency data and can realize blind spot detection and repair of cycle slips.
[0058] like figure 1 As shown, the embodiment of the present invention provides a GNSS tri-frequency combined cycle slip detection and repair method without blind spots
[0059] (1) Obtain observation data: Obtain the tri-frequency pseudo-range and carrier phase observation data of a certain station C01 satellite on June 24, 2016, and artificially add (1, 1, 0) at the 10th epoch cycle jump;
[0060] (2) Obtain the difference observation value: make a difference between the observation values between epochs, and obtain the difference observation values of the 9th and 10th epochs;
[0061]
[0...
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The invention discloses a GNSS three-frequency combination cycle slip detection and restoration method without blind spots. The method comprises the following steps: firstly, constructing a three-frequency geometric-phase-free combination and a three-frequency STPIR combination; constructing a public blind spot model by utilizing the two combinations, and further obtaining a coefficient constraintcondition of the three-frequency pseudo-range phase combination; based on the condition, constructing a three-frequency pseudo-range phase combination capable of detecting the first two combination blind spots. A three-frequency geometric-phase-free combination, a three-frequency STPIR combination and a specially-constructed three-frequency pseudo-range phase combination are combined together, and blind-spot-free detection and restoration of cycle slips of observation values of all frequency points are achieved. The invention relates to a cycle slip detection and repair method suitable for multiple systems. Compared with other common three-frequency combined detection methods, the method has good blind-spot-free detection and restoration effects, and is more suitable for practical application.
Description
technical field [0001] The invention relates to the field of satellite navigation and positioning, in particular to a GNSS triple-frequency combination cycle slip detection and repair method without blind spots. Background technique [0002] Since the development of Global Navigation Satellite System (GNSS), precise positioning technology has been relatively mature. High-precision positioning technology can provide high-quality positioning services, and its application scope has been extended to various fields such as navigation and positioning, water conservancy, land and urban planning, and major national engineering construction. Carrier phase is the most important observation value in GNSS precise positioning. In the process of carrier phase observation, due to external interference or hardware failure, the receiver's cycle counter is interrupted, resulting in a cycle jump in the carrier phase observation value. This cycle jump is called a cycle slip. The existence of ...
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Patent Timeline
Login to View More IPC IPC(8): G01S19/29G01S19/20G01S19/21G01S19/23
CPCG01S19/20G01S19/21G01S19/23G01S19/29
Inventor 于先文夏思琦
Owner SOUTHEAST UNIV