Title :
L-band and C-band InSAR studies of African volcanic areas
Author :
Wauthier, C. ; Oyen, A.M. ; Marinkovic, P.S. ; Cayol, V. ; Fernandez ; Gonzalez, J.P. ; Hanssen, R.F. ; Kervyn, F. ; d´Oreye, N. ; Shirzaei, M. ; Walter, T.R.
Author_Institution :
Dept. of Geol., R. Museum for Central Africa, Tervuren, Belgium
Abstract :
Radar interferometry has proven to be a very suitable, low-cost and accurate tool to measure surface displacements. We investigate several data fusion or time-series analysis strategies which aim to mitigate C-band InSAR restrictions for volcano deformation monitoring applications. The focus is on active African volcanic areas. Firstly, data fusion of C-band ENVISAT/ASAR and L-band ALOS/PALSAR sensors helps the determination of a rifting event sequence that took place in summer 2007 in Lake Natron area. The second strategy investigated is a new Wavelet Based InSAR time series applied on ERS-2 data covering the Nyiragongo-Nyamulagira area. It allows new ground displacements identifications outside the local rift valley. Lastly, PALSAR Quad-Pol POLInSAR applicability is explored for La Palma Island.
Keywords :
faulting; radar interferometry; remote sensing by radar; synthetic aperture radar; time series; volcanology; AD 2007; Advanced Land Observing Satellite; Advanced Synthetic Aperture Radar; C-band ASAR sensor; C-band ENVISAT sensor; C-band InSAR restrictions; ERS-2 data; East African Rift; InSAR time series; L-band ALOS sensor; L-band PALSAR sensor; La Palma Island; Lake Natron area; Nyiragongo-Nyamulagira area; PALSAR Quad-Pol POLInSAR; Phased Array Type L-band Synthetic Aperture Radar; active African volcanic areas; data fusion; local rift valley; radar interferometry; rifting event; surface displacements; time-series analysis; volcano deformation monitoring; L-band; Synthetic aperture radar interferometry; East African Rift; Radar interferometry; numerical modeling; volcano monitoring;
Conference_Titel :
Geoscience and Remote Sensing Symposium,2009 IEEE International,IGARSS 2009
Conference_Location :
Cape Town
Print_ISBN :
978-1-4244-3394-0
Electronic_ISBN :
978-1-4244-3395-7
DOI :
10.1109/IGARSS.2009.5418043
