DocumentCode :
2054541
Title :
Physical processes of microwave backscattering from laboratory wind-wave surfaces
Author :
Ebuchi, Naoto ; Kawamura, Hiroshi ; Toba, Yoshiaki
Author_Institution :
Fac. of Sci., Tohoku Univ., Sendai, Japan
fYear :
1993
fDate :
18-21 Aug 1993
Firstpage :
773
Abstract :
Microwave backscattering from wind-wave surfaces in a wind-wave tank is investigated by using an X-band (9.6 GHz) scatterometer. The radar beam is focused on the water surface by using an ellipsoidal antenna to clarify phase relationships between the backscattered signature and the wind-wave surfaces. At a slant incidence angle (45° upwind), the backscattered intensity and the Doppler velocity are in phase with the surface displacement. High Doppler velocity observed at the crests of the individual waves coincides with the propagating speed of the crests. It is concluded that the fine structures of wind-wave surfaces, which are trapped near the crests and are propagating with the crests, are main contributor to the microwave backscattering
Keywords :
backscatter; electromagnetic wave scattering; ocean waves; oceanographic techniques; radar cross-sections; remote sensing by radar; wind; 9.6 GHz; Doppler velocity; SHF; X-band; crests; laboratory wind-wave surfaces; microwave backscattering; phase relationships; propagating speed; radar beam; Antenna measurements; Backscatter; Frequency; Horn antennas; Laboratories; Microwave propagation; Radar antennas; Receiving antennas; Transmitting antennas; Wind speed;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Geoscience and Remote Sensing Symposium, 1993. IGARSS '93. Better Understanding of Earth Environment., International
Conference_Location :
Tokyo
Print_ISBN :
0-7803-1240-6
Type :
conf
DOI :
10.1109/IGARSS.1993.322222
Filename :
322222
Link To Document :
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