TerraSAR-X and ALOS/PALSAR data for soil stability monitoring in Malaysia

Yrjö Rauste, Habibah Lateh, Mohd. Muhiyuddin Wan Ibrahim Wan, Anne Lönnqvist, Tuomas Häme

Research output: Chapter in Book/Report/Conference proceedingConference article in proceedingsScientific


Early warning systems for tsunami are typically run by national rescue authorities or natural disaster centers. These centers have to operate round the clock, which is costly. Therefore it is practical to combine many hazard types in these centers. Techniques of SAR interferometry were used in image analysis. These techniques included computation of coherence between a pair of scenes and its generalization to the case of three scenes, the so called triherence. Amplitude and coherence images were ortho-rectified with a digital elevation model (DEM). Coherence and triherence in TerraSAR-X high-resolution spotlight data were lower in periods with high soil movement. Amplitude in ALOS PALSAR data showed changes in the Penang site, especially in agricultural areas. TerraSAR-X data – due to its high spatial resolution - seem suitable for monitoring the stability of forest-free hill slopes provided that movements are in the order of some tens of centimeters.
Original languageEnglish
Title of host publicationTsunami education, protection and preparedness
EditorsKoh Hok Lye, Philip L-F Liu, Teh Su Yean
Place of PublicationPenang, Malaysia
ISBN (Electronic)978-1-5231-1664-5
Publication statusPublished - 2011
MoE publication typeB3 Non-refereed article in conference proceedings
EventSouth China Sea Tsunami Workshop 3. - Penang, Malaysia
Duration: 3 Nov 20095 Nov 2009


ConferenceSouth China Sea Tsunami Workshop 3.


  • landslide
  • radar
  • risk management

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