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The aim was to study seasonal snow and permanent snow variation in alpine regions using coherence component data derived from a multi-temporal of PALSAR InSAR data. With coherence decomposition technique, we obtained the multi-temporal data of temporal-coherence component near Mt. Dagu, China, where vegetated surface, seasonal snow cover or grazing area, and permanent snow cover exist. The variation...
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...
Remote sensing of surface deformation from volcanic activity is essential to modern volcanology. This paper provides an example of how observations from multiple sensors can be combined to measure topographic changes resulting from active volcanism. High resolution DEMs were derived from optical triplets acquired by the ALOS-PRISM sensor, and processed with microwave data from ALOS-PALSAR to produce...
Synthetic aperture radar interferometry (InSAR) has been widely used for the co-seismic ground deformation monitoring. In this paper, The L-band SAR datasets acquired by ALOS PALSAR and C-band acquired by Envisat ASAR are tested respectively for monitoring the co-seismic ground deformation in the area of Dujiangyan, where the Whenchuan Ms8.0 earthquake occurred on May 12, 2008. The displacement on...
Interferometric coherence from nine image pairs acquired by the Japanese satellite ALOS over a forest area in northern Sweden have been analyzed. Coherence levels for sparse and dense forest are compared. The results are in line with previous studies for JERS-1 and confirm that in most cases the temporal decorrelation is a severe problem for L-band SAR with repeat cycles on the order of six weeks...
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