Persistent scatterer InSAR for ground deformation mapping using ALOS PALSAR data: A case study in Singapore

Persistent Scatterer InSAR (PS-InSAR) technique provides ground deformation monitoring in an accuracy of millimeter, due to its capability of overcoming the atmospheric disturbance, geometrical and temporal decorrelation. The Phased Array L-band Synthetic Aperture Radar (PALSAR) of ALOS (Advanced Land Observation Satellite) provides better capability to penetrate vegetation, which is especially useful in tropical area. In this paper, we have conducted the preliminary study on ground surface change monitoring in Singapore. 18 ascending PALSAR FBS/FBD level 1.1 data are used for this study, and the first result has identified several spots that might have small deformation, which need to be further investigated.