Single-frequency dynamic cycle slip detection and restoration method based on position domain curve constraint

A technology of cycle slip detection and repair method, which is applied to radio wave measurement systems, measurement devices, satellite radio beacon positioning systems, etc., can solve problems such as unusable, high requirements for redundant observations, and large impact on accuracy, etc., to achieve The effect of enhancing usability

Active Publication Date: 2018-06-22
TONGJI UNIV
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Problems solved by technology

However, the three-difference method has high requirements for redundant observations. When the number of three-difference observations is less than 4, this method cannot be used, and in practical applications, 5-6 or more observations are generally required to obtain better d

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  • Single-frequency dynamic cycle slip detection and restoration method based on position domain curve constraint
  • Single-frequency dynamic cycle slip detection and restoration method based on position domain curve constraint
  • Single-frequency dynamic cycle slip detection and restoration method based on position domain curve constraint

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[0049] The specific implementation manner of the present invention will be described in more detail below with reference to schematic diagrams. Advantages and features of the present invention will be apparent from the following description and claims. It should be noted that all the drawings are in a very simplified form and use imprecise scales, and are only used to facilitate and clearly assist the purpose of illustrating the embodiments of the present invention.

[0050] refer to figure 1 , in a preferred embodiment of the present invention, a single-frequency dynamic cycle slip detection and repair method includes:

[0051] Step S1: Obtain the single-frequency real-time GNSS observation data of the observation object, and construct a triple-difference observation equation according to the real-time GNSS observation data;

[0052] Specifically, refer to figure 2 , step S1 includes (step S1 is conventional technology in the art):

[0053]Step S11: Obtain the single-fr...

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Abstract

The invention relates to a single-frequency dynamic cycle slip detection and restoration method based on position domain curve constraint, and the method comprises the steps: selecting a time window with a proper length, solving a kinetic model of a detected object in the time window through the positions of all epochs in the window, taking the obtained kinetic model as a constraint condition, andcombining the constraint condition and a three-difference observation equation of a current epoch for solving and obtaining a floating point cycle slip value; preferably, trying to fix a cycle slip solution through a LAMBDA method. The method is designed according to the data features of a single-frequency low-cost GNSS satellite. The method is suitable for a stationary measurement mode and a dynamic measurement mode. The method is suitable for the combined application of a single-satellite system and a multi-satellite system. A curve fitting constraint equation is built based on the positionparameters, the model strength is higher, and the method is not affected by the changes of available satellites, and is higher in stability. Compared with a conventional three-difference iteration solution baseline method, the method does not require the redundant observation quantity of a single epoch, is wider in application range, and is more suitable for actual application.

Description

technical field [0001] The invention relates to the field of satellite positioning and navigation GNSS data processing, in particular to a cycle slip detection and repair method for single-frequency CDMA satellite system data preprocessing in applications such as satellite positioning and navigation. Background technique [0002] Since the development of Global Navigation Satellite System (GNSS), precise positioning technology has been relatively mature. High-precision RTK positioning technology can provide high-quality real-time positioning services, and its application scope has been extended to various fields such as navigation and positioning, water conservancy, land, urban planning, and major national construction projects. The application of carrier phase observations is the key to high precision GNSS measurement. During the carrier phase measurement process, due to the satellite signal being blocked by obstacles, poor atmospheric conditions or radio signal interferen...

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Application Information

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IPC IPC(8): G01S19/42
CPCG01S19/42
Inventor 李博峰刘天霞
Owner TONGJI UNIV
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