INSAR satellite ground corner reflector and differential settlement monitoring method

Abstract

The invention discloses an INSAR (Interferometric Synthetic Aperture Radar) satellite ground corner reflector and a differential settlement monitoring method. The INSAR satellite ground corner reflector comprises a foundation, a connecting column, a Beidou receiving antenna and a corner reflector, wherein the foundation is mainly used for fixing the connecting column; an angle automatic adjustingdevice is arranged between a signal reflecting device and the connecting column, and is capable of performing angle adjustment according to a depression angle of an INSAR satellite; the Beidou receiving antenna is arranged at the top end of the connecting column and used for receiving Beidou satellite signals. Through adoption of the INSAR satellite ground corner reflector and the differential settlement monitoring method of the invention, accurate positioning is performed on a point without strong scattering through the Beidou satellite, simultaneously a strong scattering point is formed by use of the corner reflector, dynamic settlement of the point is monitored by use of an INSAR processing technology, and azimuth correction is performed in combination with Beidou positioning information to obtain an accurate result, thereby saving labor, reducing cost and shortening a settlement monitoring period.

Description

technical field [0001] The invention relates to the technical field of differential settlement measurement, in particular to a general-purpose INSAR ground angle reflector based on Beidou point observation piers and a differential settlement monitoring method. Background technique [0002] Technology is a new and effective method for surface differential monitoring. In order to monitor the differential settlement between adjacent points at fixed points, the use of INSAR ground corner reflectors at points that cannot form strong scattering points can improve the strength and accuracy of the signal. [0003] When the technology is used for surface subsidence monitoring, it needs to compare the accuracy with the leveling elevation data index and the Beidou coordinate index, correct the position of the monitoring point through the coordinate point, and integrate the INSAR technology with the Beidou positioning technology. The technical issues that still exist are: [0004] The ...

AI Technical Summary

Problems solved by technology

[0004] The angle of the existing INSAR ground corner reflector cannot be automatically adjusted, the manual azimuth adjustment is relatively complicated, the angle control accuracy is low, and the rotation angle of the signal reflection device is limited. The measurement point is different from the reference point, and the measurement results cannot be compared in the same reference system

At the same time, the calculation results lack accuracy in positioning, and the permanent scatterer points calculated by INSAR cannot be accurately mapped to the locations of ground objects.

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