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GNSS network differential positioning reference station network construction method and dynamic updating method

A technology of positioning reference and dynamic update, applied in positioning, measuring devices, instruments, etc., can solve problems such as heavy calculation and communication load, encryption and update of reference station, etc., to reduce calculation burden, ensure accuracy requirements, and improve error correction accuracy. Effect

Inactive Publication Date: 2009-08-05
SOUTHEAST UNIV
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Problems solved by technology

At present, the development of GNSS network differential positioning technology presents the characteristics of real-time and large-scale, and the number of reference stations and users is constantly increasing, so the calculation and communication load of the control center is also increasing, and at the same time, it is faced with the choice of which Problems such as base station positioning solution and network real-time dynamic update caused by base station encryption or temporary unavailability

Method used

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  • GNSS network differential positioning reference station network construction method and dynamic updating method
  • GNSS network differential positioning reference station network construction method and dynamic updating method
  • GNSS network differential positioning reference station network construction method and dynamic updating method

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Embodiment Construction

[0024] The working principle and specific implementation of the present invention will be further described below in conjunction with the accompanying drawings.

[0025] Such as figure 1 , the composition of the GNSS network differential positioning reference station system involved in the present invention comprises:

[0026] (1) GNSS satellite positioning system

[0027] GNSS receivers distributed on the earth's surface receive GNSS satellite signals from space. GNSS navigation satellite systems include GPS, GLONASS, GALILEO and Beidou satellite systems.

[0028] (2) GNSS receiver and antenna

[0029] GNSS base station receiver type is dual-frequency (L1 and L2) 12 channels, mobile station receiver can be single-frequency (including pseudo-range, carrier phase output) or dual-frequency, choose to match the receiver (in terms of power, etc. ) antenna, in principle, use a standard feeder line shorter than 15m to connect the antenna and receiver. The reference station is er...

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Abstract

The invention discloses a constructing method and a dynamically updating method of a GNSS network difference positioning reference station network. In the method, each GNSS reference station is projected to a two-dimensional plane according to the known and accurate coordinates of the GNSS reference station; a reference station network taking a triangle as a basic structure is formed by the discrete points of the two-dimensional plane according to the network constructing rule of a Delaunay triangle network, and the shape of the network is unique. When a new reference station is increased or a certain reference station is not used, the real-time construction of a new network is finished through operation of point insertion or point deletion. The invention can keep the unique optimized network shape of the reference stations and meet the precision requirement when a movable station is positioned.

Description

technical field [0001] The invention relates to a GNSS network differential positioning reference station network construction method and a dynamic update method, belonging to the field of GNSS network differential positioning. 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 investigation and other industries. The positioning system usually includes multiple reference stations to form a network of reference stations covering a certain area. The distribution of reference stations The situation will directly affect the baseline ambiguity resolution efficiency and parameter estimation accuracy. At present, the development of GNSS network differential positioning technology presents the characteristics of real-time and large-scale, and the number of reference stations and users is constantly increasing, so the calc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S5/02
Inventor 王庆潘树国朱超柯福阳袁本银李菲
Owner SOUTHEAST UNIV
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