Abstract:

Single-reference point Permanent Scatterers Interferometry (PS-InSAR) can result in an unstable and unreliable solution in the data processing of baseline network adjustment. This paper advances a multi-reference points PS-InSAR data processing method by adding ground monitoring data and the corresponding mathematic model is derived. By introducing multi-reference points in the PS baseline network processing, the solution’s stability and reliability can be improved due to extra observations condition. In the experiment, thirteen Envisat ASAR images covering the Xi’an city and five reference points composing of Corner Reflectors (CR) and GPS are employed to prove the superiority of the proposed method. Processing these data, average surface deformation field from single-reference point and multi-reference points are created respectively. The results of comparing four checking points show that solution from multi-reference points is much more consistent with ground observation result than single-reference point.

Key words: PS-InSAR, baseline network adjustment, deformation monitoring data processing, multi-reference points