Application of differential SAR interferometry over the Baegdu stratovolcanic mountain

Mt. Baegdu, a Cenozoic stratovolcano, was studied using twenty-three JERS-1 SAR and two ERS-2 SAR data sets. We investigated surface changes for 6 years from 1992 to 1998 using three approaches: (i) interferograms of large altitude of ambiguity, (ii) the 2-pass, and (iii) 3-pass DInSAR technique. After analyzing 11 differential interferograms having various time intervals, we suggest that several tens of kilometres of surfaces are subsiding centered around the southwest part of Mt. Baegdu. When the observed displacement is assumed to be only in the vertical direction, the rate of surface subsidence is about 9 cm/year. Although these results are not conclusive due to lack of ground truthing, they must be very useful as background information for long-term monitoring