Beidou/GNSS network RTK algorithm suitable for high-precision deformation monitoring

Abstract

The invention discloses a Beidou / GNSS network RTK algorithm suitable for high-precision deformation monitoring, and relates to the technical field of deformation monitoring, and the implementation process is as follows: data of a monitoring end and a GNSS continuous operation reference station are transmitted back to a server, and the server divides regional subnets according to the position of the reference station; constructing a reference station GNSS observation equation, fixing double-difference ambiguity of all baselines in a reference station network, and extracting inclined path ionosphere and zenith troposphere delay information of the GNSS reference station baselines; enabling the server to select a proper reference station subnet and a main reference station according to the position of the monitoring station, and obtaining information of an inclined path ionosphere and a zenith troposphere between the main reference station and the monitoring station through interpolation; serving the atmospheric correction value and the precision information of the atmospheric correction value as the virtual observation value and inputting into the constructed observation equation between the main reference station and the monitoring station, and therefore, compared with a conventional GNSS monitoring algorithm, the algorithm provided by the invention is wide in application range and high in applicability, and can effectively save the monitoring cost and improve the monitoring performance.

Description

technical field [0001] The invention relates to the technical field of deformation monitoring, in particular to a Beidou / GNSS network RTK algorithm suitable for high-precision deformation monitoring. Background technique [0002] In the early days, artificial earth satellites were only used as a space observation target. This kind of geometric observation of satellites can solve the problem of long-distance land-sea-island joint measurement and positioning that is difficult to achieve with conventional geodesy. However, this method is time-consuming and laborious, not only has low positioning accuracy, but also cannot measure the geocentric coordinates of the point. [0003] The Meridian Satellite Navigation System (NNSS) developed by the United States in the late 1950s is the predecessor of GPS. It uses a star network composed of 5 to 6 satellites to work and circumvents the earth 13 times a day at most, but it cannot give altitude information. It's also unsatisfactory. H...

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Problems solved by technology

However, this method is time-consuming and laborious, not only has low positioning accuracy, but also cannot measure the geocentric coordinates of the point

[0003] The Meridian Satellite Navigation System (NNSS) developed by the United States in the late 1950s is the predecessor of GPS. It uses a star network composed of 5 to 6 satellites to work and circumvents the earth 13 times a day at most, but it cannot give altitude information. unsatisfactory

[0007] At present, the traditional monitoring system is mostly based on the conventional short-distance RTK algorithm for deformation monitoring. In actual monitoring projects, the stability of the reference points near the disaster body is usually difficult to guarantee, resulting in the inability to obtain a stable and reliable deformation sequence of the monitoring site. In addition, The deformation monitoring system based on conventional short-baseline RTK is only suitable for deformation monitoring projects in small areas, and cannot meet the application requirements of high-precision deformation monitoring for large-scale disaster bodies or structures such as large-scale landslides and large bridges.

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