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A sensitivity analysis of dual-polarization features to damage due to the 2016 Central-Italy earthquake
Language
English
Obiettivo Specifico
Status
Published
JCR Journal
JCR Journal
Title of the book
Issue/vol(year)
/39(2018)
Pages (printed)
6846-6863
Issued date
2018
Abstract
In this study, the sensitivity of dual-polarization features extracted
from dual-polarimetric coherent synthetic aperture radar (SAR)
imagery to urban damage due to the earthquake occurred in
Central -Italy in 2016 is addressed. First, a conventional singlepolarization
feature, based on the coherence between pre- and
post-event co-polarized imagery, is analysed using SAR scenes
collected by the Copernicus Sentinel-1 mission over the area of
Amatrice, an Italian city significantly damaged by the 2016 earthquake
that affected Central Italy. Then, the same analysis is undertaken
using the cross-polarized channel to point out that the joint
use of co- and cross-polarized channels can help in better observing
the damaged area. Finally, a coherent dual-polarimetric feature,
based on the inter-channel coherence, is proposed. This
feature results in a sensitivity to damaged areas comparable to
the one provided by conventional single-polarization features.
However, the interchannel coherence has the benefit to be
based only on two SAR acquisitions, i.e. before and after the
earthquake and it is less affected by false alarms. SAR, polarimetry,earthquake, losses.
from dual-polarimetric coherent synthetic aperture radar (SAR)
imagery to urban damage due to the earthquake occurred in
Central -Italy in 2016 is addressed. First, a conventional singlepolarization
feature, based on the coherence between pre- and
post-event co-polarized imagery, is analysed using SAR scenes
collected by the Copernicus Sentinel-1 mission over the area of
Amatrice, an Italian city significantly damaged by the 2016 earthquake
that affected Central Italy. Then, the same analysis is undertaken
using the cross-polarized channel to point out that the joint
use of co- and cross-polarized channels can help in better observing
the damaged area. Finally, a coherent dual-polarimetric feature,
based on the inter-channel coherence, is proposed. This
feature results in a sensitivity to damaged areas comparable to
the one provided by conventional single-polarization features.
However, the interchannel coherence has the benefit to be
based only on two SAR acquisitions, i.e. before and after the
earthquake and it is less affected by false alarms. SAR, polarimetry,earthquake, losses.
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article
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