Surface deformation detection method based on synthetic aperture radar interferometry technology

Abstract

The invention discloses a surface deformation detection method based on a synthetic aperture radar interferometry technology. The method comprises the following steps: collecting synthetic aperture radar images of an area to be detected, and sorting according to shooting time; selecting two images with a time interval of one year in a wide mode, and processing the images by using a differential synthetic aperture radar interferometry technology to obtain a surface deformation amount rough graph in an interval period; and extracting the range of the deformation area, cutting all the synthetic aperture radar images according to the range of the deformation area, and processing the cut images by using a time sequence synthetic aperture radar interferometry technology to obtain a deformation time sequence detail map of the area. The method can achieve the quick obtaining of the deformation range and deformation magnitude of the ground surface under the condition that whether the ground surface is deformed or not is not determined in advance, facilitates the quick recognition of geological disaster hidden danger points, and plays a positive role in improving the general investigation efficiency of geological disasters in a large range.

Description

technical field [0001] The invention relates to the technical field of surface deformation monitoring, in particular to a surface deformation detection method based on synthetic aperture radar interferometry technology. Background technique [0002] As a new space earth observation technology, Interferometric of Synthetic Aperture Radar (InSAR) technology has the characteristics of all-weather, wide coverage and high precision, and has unique advantages in the field of surface deformation monitoring. , Slope deformation monitoring, crustal deformation monitoring, artificial building deformation monitoring and other fields have been widely used, and the effect is good. InSAR technology mainly includes Differential Interferometric of Synthetic Aperture Radar (D-InSAR) and Time Series Interferometric of Synthetic Aperture Radar (TS-InSAR), in which the monitoring accuracy of D-InSAR technology can be Up to centimeter level, it can generally be used to detect annual cumulative ...

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Problems solved by technology

[0003] ×108=7.6×1010, the amount of calculation is increased by 19 times and 190 times respectively, but the actual surface deformation is only a part of the image, resulting in a long calculation time

[0004] At present, there are two main ways to solve the above problems: one is to upgrade the software and hardware required for calculation to improve the calculation efficiency, but the calculation of large-scale surface deformation is still insufficient; the other is to crop the image first, and only the deformation area TS-InSAR calculation is performed on images, but it is difficult to apply to geological hazard investigations where the range of deformation areas is unknown

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