Catalogo Articoli (Spogli Riviste)

OPAC HELP

Titolo:
REMOVAL OF TERRAIN EFFECTS FROM SAR SATELLITE IMAGERY OF ARCTIC TUNDRA
Autore:
GOERING DJ; CHEN H; HINZMAN LD; KANE DL;
Indirizzi:
UNIV ALASKA,SCH ENGN,WATER RES CTR FAIRBANKS AK 99775
Titolo Testata:
IEEE transactions on geoscience and remote sensing
fascicolo: 1, volume: 33, anno: 1995,
pagine: 185 - 194
SICI:
0196-2892(1995)33:1<185:ROTEFS>2.0.ZU;2-Z
Fonte:
ISI
Lingua:
ENG
Soggetto:
SOIL-MOISTURE; BACKSCATTER;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Science Citation Index Expanded
Science Citation Index Expanded
Citazioni:
15
Recensione:
Indirizzi per estratti:
Citazione:
D.J. Goering et al., "REMOVAL OF TERRAIN EFFECTS FROM SAR SATELLITE IMAGERY OF ARCTIC TUNDRA", IEEE transactions on geoscience and remote sensing, 33(1), 1995, pp. 185-194

Abstract

Synthetic aperture radar (SAR) images of the Earth's terrestrial surface contain geometric and radiometric image effects which are caused by varying terrain elevation and slope. The radiometric effects tend tomask signal variations caused by other physical variables such as soil moisture and surface vegetation type, which are known to influence SAR backscatter signals, As a result, raw SAR images are of limited usein classifying surface vegetation type or quantifying the spatial distribution of soil moisture in regions of terrain relief, The present paper presents a technique for removing radiometric terrain effects from SAR images, Image correction was carried out in two steps, First, anexisting modeling package was used in combination with digital elevation data in order to map the raw image pixels onto a geodetic coordinate system, thereby removing the geometric portion of the image distortion, Radiometric effects were then removed with the aid of a backscatter model which treats the reflected radiation as a combination of diffuse-Lambertian and specular components, Parameters in the backscatter model were determined by comparing two C-band SAR images of a test area in a region of arctic tundra which were taken from ascending and descending orbit tracks of the ERS-1 satellite, The ascending and descending images displayed reductions in pixel value variance of 30% and 13%, respectively, after professing, Direct comparison of the two test area images reveals a dramatic improvement in image similarity after processing,

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 22/09/20 alle ore 20:30:53