A CORS base station cycle slip detection and repair method

A technology of cycle slip detection and repair method, which is applied in measuring devices, radio wave measurement systems, satellite radio beacon positioning systems, etc., and can solve problems such as systematic errors in forecast values

Inactive Publication Date: 2011-12-21
SOUTHEAST UNIV
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Problems solved by technology

[0004] In VRS, the correct forecast of tropospheric and ionospheric double-difference corrections is the basis for precise positioning of the user, while in real-

Method used

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  • A CORS base station cycle slip detection and repair method
  • A CORS base station cycle slip detection and repair method
  • A CORS base station cycle slip detection and repair method

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Embodiment

[0079] Embodiment: use this method in Tianjin CORS test reference station, Tianjin CORS test reference station network includes 15 continuous operation reference stations such as Dagang (DG), Xiqing (XQ), NH (NH), and experiment adopts December, 2009 The data of the three base stations DG, XQ, and NH in the 11th network, the sampling interval is 1s, and the data of 5 minutes is taken. Such as image 3 shown. Among them, all tracking satellites have no cycle slips. In order to analyze the ability of cycle slip detection and repair, cycle slips are added artificially. Among them, the reference satellite PRN=14 and the altitude angle of 60° are selected. PRN=30 satellites, altitude PRN = 32 satellites with an angle of 10°. The specific cycle slip values ​​are shown in Table 1 below:

[0080]

[0081] Number of cycle slips to be detected added in Table 1

[0082] Use the ionospheric residual method to detect the cycle slip, and classify the observed values ​​according to th...

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Abstract

The invention discloses a continuous operational reference system (CORS) base station cycle slip detection and recovering method, which comprises the following steps that: firstly, an ionized layer residual method is used for carrying out cycle slip detection, a satellite with the cycle slip and the corresponding observation value are determined, then, a single-epoch dual-frequency observation equation is built according to the cycle slip detection results, the single-epoch dual-frequency observation equation is divided into two types, the first type is cycle-slip-free observation equations, the second type is cycle slip observation equations, the cycle slip generated by a non-reference satellite is used as a gross error, the cycle slip generated by a reference satellite is used as a system error, the first type observation equations are used for carrying out parameter estimation, the cycle slip of the reference satellite is determined, the estimated parameters are introduced into thesecond type observation equations, correction numbers are calculated, the cycle slip values of the reference satellite are obtained, and finally, the cycle slip base station observation data is recovered according to the relationship between the base lines in a CORS triangular net. Because the error time strong correlation of the precise coordinate, the dual-frequency convection layer, the ionized layer and the like is directly utilized, the cycle slip detection and recovery can be precisely carried out.

Description

technical field [0001] The invention relates to GNSS network differential positioning technology, in particular to a CORS base station (continuous operation reference station) cycle slip detection and repair method, which is an important part of CORS system integrity monitoring. Background technique [0002] GNSS network differential positioning technology is currently a popular technology in the field of satellite positioning. It is widely used in surveying and mapping, land and resources survey and other industries. The rise of network differential technology represented by virtual reference station (VRS) technology has enabled the establishment of a base station network GPS service system Become the latest trend in the development of current GPS technology applications. As a GPS real-time dynamic positioning technology in a multi-reference station environment, VRS technology is a network RTK positioning technology integrating Internet technology, wireless communication te...

Claims

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Application Information

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IPC IPC(8): G01S19/44G01S19/13
Inventor 潘树国王庆王胜利
Owner SOUTHEAST UNIV
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