Abstract

We explore new possibilities offered by the recently available X-band satellite radar sensors for landslidehazard assessments on a detailed scale, with particular reference to the exploitation of Persistent ScatterersInterferometry (PSI) techniques. Special attention is paid to the impact of the improved resolution of new Xbandradar imagery on the PSI results, in terms of quality and quantity of useful information. This evaluationis supported by theoretical modelling as well as by the comparison of results from X-band (CSK) and C-band(ENVISAT) PSI for two areas of interest: one in Italy and the other in Switzerland. It is demonstrated that withrespect to medium resolution ENVISAT PS processing, fewer CSK high resolution images are sufficient toachieve comparable precision of the mean displacement velocity estimates. This, together with the shorterrevisit times provided by the CSK constellation, can be very important when dealing with emergency situations.Furthermore, it is quantified that from about 3 to 11 times greater PS densities are obtained with thehigher resolution X-band data. This implies more information about ground surface displacements as wellas improved landslide monitoring and slope instability investigation capabilities. Furthermore, ground displacementmeasurements can be interpreted without local knowledge of the focus area or in situ controls,and, nonetheless, guide single hillslope instability assessments with support of Google Earth and its high resolutionoptical imagery. This "blind" approach will allow one to monitor remote and poorly known regions athigh risk of potentially disastrous slope failures.

Autore Pugliese

• Wasowski Janusz , Bovenga Fabio

Tutti gli autori

• Bovenga F.; Wasowski J.; Nitti D.O.; Nutricato R.; Chiaradia M.T.

Titolo volume/Rivista

Remote sensing of environment

Anno di pubblicazione

2012

ISSN

0034-4257

ISBN

Non Disponibile

Numero di citazioni Wos

Nessuna citazione

Ultimo Aggiornamento Citazioni

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Numero di citazioni Scopus

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Settori ERC

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Codici ASJC

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