The invention discloses a fault slip model
smoothing method based on SAR
observation data, and the method comprises the steps: firstly, obtaining multi-source
observation data (including SAR, GNSS and optical images), and carrying out the joint calculation, and generating a high-resolution
earth surface deformation field; the method comprises the following steps: combining a
remote sensing image, visually interpreting and drawing a fracture trace, then carrying out data downsampling along an inclination angle direction, and finally constructing an irregular fault geometric model by using a
TIN method so as to obtain an initial
fault plane model. On this basis, a Laplacian operator suitable for triangular
dislocation is defined, a slip inversion model is constructed in combination with an elastic
dislocation theory, and a
smoothing factor is introduced to balance slip details and calculation efficiency. And finally, optimizing a fault inclination angle and a
smoothing factor through a grid search method, evaluating fitting errors and slippage roughness under different combinations, and determining optimal parameters. The final model not only comprises a triangular connection relation, but also provides slip amount distribution and fault dip angle information, and an important basis is provided for seismic activity evaluation and disaster response.