Multi-reference station-based network RTK (Real Time Kinematic) area atmospheric error modeling method

Abstract

The invention discloses a multi-reference station-based network RTK (Real Time Kinematic) area atmospheric error modeling method. The method comprises the following steps of firstly, using multi-reference redundant observation information to build a multi-reference station structure-based basic resolving unit; secondly, for the multi-reference station structure-based basic resolving unit, studying an algorithm of network RTK area troposphere correction number, providing a network RTK area troposphere error modeling method which considers height difference influence and is suitable for a multi-reference station structure, and obtaining a flow station troposphere error correction value. On the basis of considering height difference, the precision and the reliability of network RTK area troposphere correction number can be obviously improved, particularly, for a low-altitude angle satellite, the precision and the reliability are higher.

Description

technical field [0001] The invention belongs to the field of network RTK positioning, and relates to the calculation of network tropospheric error correction numbers between stations in a continuous operation reference station (CORS) system, in particular to a network RTK regional atmospheric error modeling based on a multi-reference station structure in a GNSS network differential positioning system method. Background technique [0002] With the development of global satellite navigation and positioning systems, GNSS network differential positioning technology is currently a popular technology in the field of satellite positioning. The earth reference coordinate and geodynamic service system composed of global satellite navigation system, computer network and communication technology is the result of the integration of network and GNSS positioning technology and modern geodetic survey and geodynamics. It is a combination of conventional RTK and differential global positioni...

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Problems solved by technology

But this triangular network structure also has some deficiencies, mainly in: (1) It adopts a single baseline calculation mode, which does not make full use of the redundant observation information of multiple reference stations, which is not conducive to the initialization of large-scale reference station networks; ( 2) independent The baseline information is less (2 baselines), which limits the accuracy of the optional mathematical models (model parameters <= 2) for interpolation calculations, thus affecting the accuracy of the corrections to a certain extent, especially for elevation The positioning accuracy of areas with large differences will be reduced; (3) For areas other than the basic calculation unit, the correction accuracy will drop significantly with the increase of distance

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