Abstract
Microwave signatures of the ocean surface are a¿ ected by wind and
rain. To support the development of theoretical models for remote sensing applications,
radar scatterometry experiments at 13.5 and 36GHz with VV polarization
were conducted at the Rain± Sea Interaction Facility at NASA Wallops.
Backscatterings from rain drop impacts on fresh and salt water surfaces were
measured with an incidence angle of 30ß for eight di¿ erent drop sizes. Results are
also presented for terminal and non-terminal fall velocities. Surface features were
imaged by an ultrahigh-speed digital camera synchronizedwith radar data acquisition
and their geometrical characteristics were determined. Backscattered powers
from crowns, craters, stalks and ring-waves were measured and compared. These
measurements con® rm that for slant radar con® gurations, ring-waves are the
dominant scattering contribution, even though stalk scattering is not negligible.
Original language | English |
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Pages (from-to) | 2149-2166 |
Number of pages | 18 |
Journal | International Journal of Remote Sensing |
Volume | 20 |
Issue number | 11 |
DOIs | |
Publication status | Published - 1999 |