| The results are compared to volcanic ash distribution map in the document and the thickness by the field survey conducted by the authors. The following conclusions are obtained:1) in terms of SAR coherence, the area between50mm and100mm volcanic ash thickness is obtained as the lower coherence area;2) in terms of SAR interferogram, the area with clear fringe pattern is in good agreement with the range between 50kg/m2 and100kg/m2 of the volcanic ash distribution map. These results indicate that the technique of DInSAR using ALOS/PALSAR can be one of useful tools in detecting an area and a thickness of volcanic ash. |
