Three-dimensional crustal deformation conversion method based on monorail InSAR observation

Abstract

The invention discloses a three-dimensional crustal deformation conversion method based on monorail InSAR observation, and the method comprises the following steps: 1), carrying out the inversion of fault sliding distribution through employing monorail InSAR sight direction one-dimensional data and preliminary or simplified fault geometric parameters based on an elastic dislocation model; then performing orward modeling to obtain a continuous three-dimensional deformation direction of the earth surface space; and 2) taking the three-dimensional deformation direction obtained in the step 1) asa constraint, converting InSAR sight into one-dimensional deformation data to obtain N, E and U three-dimensional data, and further obtaining an earth crust deformation three-dimensional deformation field. According to the invention, the intrinsic physical significance of earth crust motion is reflected, the local detail characteristics of the fault deformation direction are reflected, very important boundary and constraint conditions are provided for inversion of earth internal structure deformation, and a new method is provided for acquisition of an inter-earthquake continuous surface three-dimensional deformation field and further analysis of crustal deformation characteristics.

Description

technical field [0001] The invention belongs to the technical field of geodesy and crustal deformation monitoring, and in particular relates to a robust three-dimensional crustal deformation conversion method based on monorail InSAR observation. Background technique [0002] Interferometric Synthetic Aperture Radar (InSAR) technology has become the main observation method for high-density planar deformation due to its high spatial resolution, wide coverage and high sensitivity to deformation. It has been widely used in monitoring large-scale continuous Surface deformation, such as earthquake deformation, volcanic movement, land subsidence, mine deformation, volcanic activity, glacier drift, landslide and other fields. [0003] However, what InSAR detects is only the projection of the three-dimensional surface deformation north (N), east (E), and up (U) directions on the radar line of sight, which belongs to one-dimensional deformation, and there is a problem of direction blu...

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Problems solved by technology

These methods require the support of multi-track observation data with different geometric structures, and there is no stable conversion method specially suitable for 3D crustal deformation; although the continuous 3D deformation field can be obtained through the forward modeling of the dislocation model, the results mainly depend on the The degree of refinement of the model and the prior information of the fault, usually the fault slip parameters obtained by different scholars using different methods are quite different, and each holds their own opinions, resulting in completely different three-dimensional deformation fields on the surface

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