Altimetry backscattering signatures at Ku and S bands over land and ice sheets

被引：6

作者：

Blarel, Fabien ^{[1
]}

Frappart, Frederic ^{[1
,2
]}

Legresy, Benoit ^{[1
]}

Blumstein, Denis ^{[1
,3
]}

Remy, Frederique ^{[1
]}

Fatras, Christophe ^{[2
]}

Mougin, Eric ^{[2
]}

Papa, Fabrice ^{[1
]}

Prigent, Catherine ^{[4
]}

Nino, Fernando ^{[1
]}

Borderies, Pierre ^{[5
]}

Biancamaria, Sylvain ^{[1
]}

Calmant, Stephane ^{[1
]}

机构：

[1] Observ Midi Pyrenees, Lab Etud Geophys & Oceanog Spatiales LEGOS GRGS, CNES CNRS IRD UPS,UMR 5566, F-31400 Toulouse, France

[2] Observ Midi Pyrenees, CNRS IRD UPS, Geosci Environm Toulouse GET GRGS, UMR 5563, F-31400 Toulouse, France

[3] CNES, F-31400 Toulouse, France

[4] Observatoire Paris, Lab Etud Rayonnement & Mat Astrophys & Atmosphere, CNRS ENS UPMC UCP, UMR 8112, F-75014 Paris, France

[5] Off Natl Etud & Rech Aerosp, F-31400 Toulouse, France

来源：

REMOTE SENSING FOR AGRICULTURE, ECOSYSTEMS, AND HYDROLOGY XVII | 2015年 / 9637卷

关键词：

Radar altimetry; backscattering coefficient; dielectrical properties; land; ice sheets; FREQUENCY RADAR ALTIMETER; SURFACE SOIL-MOISTURE; ERS SCATTEROMETER; DYNAMICS; MOSAICS; AREA;

D O I：

10.1117/12.2194498

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Satellite radar altimetry, initially designed for studying ocean surface topography, demonstrated a strong potential for the continuous monitoring of ice sheets and land surfaces over the last 25 years. If radar altimetry is mostly used for its capacity to determine surface height, the backscattering coefficients provide information on the surface properties. Spatio-temporal variations of radar altimetry backscattering over land and ice sheets were related to the nature of the surface and its changes against time. This study presents the results of an along-track analysis of radar altimetry echoes over land, Antarctica and Greenland at Ku and S bands from June 2002 to July 2003 using the ERS-2 and ENVISAT datasets on their nominal orbit during the tandem phase of the two missions. Temporal average and deviations are presented at global scale for ascending and descending tracks for the two missions.

引用

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