Abstract
The conventional D-InSAR technique has been successfully applied in the volcano, earthquake induced surface deformation monitoring of large scale. However it is restricted by the loss of coherence and atmospheric delay effect. Advanced PS-INSAR as IPTA (Interferometric Point Target Analysis) technology was used to monitor urban area in Cangzhou city. Linear equations and the periodic function were used to fit the region of the deformation field. The experimental results show that the region of maximum deformation rate up to 20mm/yr and the maximum deformation of 45mm at Mar. 2010 in the central of Cangzhou city with 17 ASAR data from 23 February 2007 to 15 October 2010. It is well correlation with groundwater monitor well’s water level. The results show IPTA technique is capable of detecting long-term accumulated crustal deformation on landslip and active faults and is superior to the conventional PS-INSAR in the realization of efficiency and data storage. It will become one of the most effective technologies to monitor of landslide, active faults and seismic deformation.
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