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Titolo:
CHANGE DETECTION ON ALASKA NORTH SLOPE USING REPEAT-PASS ERS-1 SAR IMAGES
Autore:
VILLASENOR JD; FATLAND DR; HINZMAN LD;
Indirizzi:
UNIV CALIF LOS ANGELES,DEPT ELECT ENGN LOS ANGELES CA 90024 JET PROP LAB PASADENA CA 91109 UNIV ALASKA,WATER RES CTR,INST NO ENGN FAIRBANKS AK 99775
Titolo Testata:
IEEE transactions on geoscience and remote sensing
fascicolo: 1, volume: 31, anno: 1993,
pagine: 227 - 236
SICI:
0196-2892(1993)31:1<227:CDOANS>2.0.ZU;2-4
Fonte:
ISI
Lingua:
ENG
Soggetto:
VEGETATION; HYDROLOGY; FOOTHILLS; TERRAIN; SITE;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Science Citation Index Expanded
Citazioni:
23
Recensione:
Indirizzi per estratti:
Citazione:
J.D. Villasenor et al., "CHANGE DETECTION ON ALASKA NORTH SLOPE USING REPEAT-PASS ERS-1 SAR IMAGES", IEEE transactions on geoscience and remote sensing, 31(1), 1993, pp. 227-236

Abstract

Measurements of the C-band (wavelength = 5 cm) radar cross section ofan area in the Brooks Range foothills on the North Slope of Alaska using images from the ER-S-1 satellite show significant temporal changes. These changes are strongly correlated with elevation and hillslope orientation and are greatest on some of the elevated areas and weaker in river drainages. By constructing ''difference images'' using variousimage pairs, and by analyzing climatological and hydrological data from the site, we conclude that the radar backscatter changes are largely due to changes in soil and vegetation liquid water content induced by freeze/thaw events. The correlation with topography in the difference images arises from the dependence of vegetation, organic layer thickness, and volumetric water content on hillslope position and orientation. These results demonstrate the viability of radar backscatter intensity comparisons using repeat-pass images as a means of change detection.

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Documento generato il 22/09/20 alle ore 20:45:04