Integration of GPS and DInSAR for 3 D Deformation Monitoring Based on Ant Colony Optimization

Abstract:

To acquire three dimension surface deformation, a measurement method based on ant colony optimization (ACO) was proposed. It highly integrated high accuracy GPS observations from sparse ground points with the line of sight(LOS) measurements acquired by DInSAR. Two constraints, GPS and differential In SAR(DInSAR) observations, were employed in constructing the energy function based on Gibbs equation, whose minimum value was searched by the ACO operated in a continuous space. A relatively high accuracy of 3 D deformation monitoring was achieved by the proposed method, especially a significant improvement in the vertical direction.

Key words:global positioning system; Differential Interferometric Synthetic Aperture Radar(DInSAR); ant colony optimization; surface deformation; integration method.