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Global navigation satellite system (GNSS) triple-frequency motion-to-motion positioning method

A positioning method and frequency-moving technology, applied in the field of satellite navigation and positioning, can solve problems such as the failure of the ambiguity value of the whole circle, achieve high-precision and high-efficiency motion-to-motion positioning, improve calculation accuracy, and improve calculation efficiency.

Active Publication Date: 2010-05-19
威海五洲卫星导航科技股份有限公司
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Problems solved by technology

For the above three-frequency ambiguity fixing method, Geometry-free TCAR or Geometry-Based TCAR technology is used to solve all the integer ambiguities, but the problem with these two technologies is that when the observation conditions are poor or the number of observation satellites is large , solving all integer ambiguity values ​​will fail

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  • Global navigation satellite system (GNSS) triple-frequency motion-to-motion positioning method

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Embodiment Construction

[0022] The technical scheme of the present invention is described below in conjunction with accompanying drawing and embodiment:

[0023] The three frequency bands involved in the embodiment are three frequency bands, respectively identified as L1 / L2 / L5. The GNSS mobile-to-mobile positioning process provided by the embodiment of the present invention is as follows: figure 2 Shown:

[0024] In the starting epoch, perform the following three steps,

[0025] Step 1. The two moving carriers are respectively used as mobile observation station 1 and mobile observation station 2, and the original observation tri-frequency GNSS data is provided under the precise ephemeris and clock error, and then the original tri-frequency GNSS data is preprocessed, including Tri-frequency data cycle slip detection and repair.

[0026] Step 2: According to the preprocessed tri-frequency GNSS data obtained from mobile observation station 1, perform tri-frequency precise point positioning on mobile...

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Abstract

The invention relates to a global navigation satellite system (GNSS) triple-frequency motion-to-motion positioning method. In the original epoch, the triple-frequency precision single-point positioning technology is adopted to obtain the coordinates of two movable carriers, one of the two movable carries is selected as the reference station for the triple-frequency double-difference position, the triple-frequency double-difference positioning technology is adopted to calculate the baseline component of the two movable carriers and the integer ambiguity resolution of the double-difference carrier phase, and the baseline component of the two movable carriers and the integer ambiguity resolution of the double-difference carrier phase are used as the constraint conditions for the triple-frequency precision single-point positioning in the subsequent epochs to improve the single-point position precision and the convergence speed thereof. The geometry-Base TCAR ambiguity resolution fixation method is adopted to calculate the triple-frequency integer ambiguity resolution. The three irrelevant combination observation values of the triple-frequency non-ionizing layer and the long wave-length and low noise carrier are adopted to detect and repair the cycle slip of the original observation data.

Description

technical field [0001] The invention belongs to the technical field of satellite navigation and positioning, in particular to a GNSS three-frequency dynamic-to-dynamic positioning method. Background technique [0002] Global Navigation Satellite System (GNSS) carrier phase differential dynamic positioning technology can achieve centimeter-level accuracy, and is widely used in the field of high-precision navigation and positioning. However, the differential dynamic positioning of the traditional "static-dynamic" mode requires a static reference station with known coordinates, and the mobile observation station and the static reference station form a differential mode to obtain the position of the mobile observation station. In many occasions, what needs to be concerned is the relative position of two moving vehicles, such as aerial refueling, formation flight, aircraft docking, precise attitude determination, etc. E.g figure 1 As shown, the GNSS dynamic-to-dynamic positioni...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S19/01G01S19/44
Inventor 张小红于兴旺
Owner 威海五洲卫星导航科技股份有限公司
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