Intermediate Wave Effects in Microwave Backscatter from the Ocean
WASHINGTON UNIV SEATTLE APPLIED PHYSICS LAB
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Our long-range objective is to understand ocean backscatter sufficiently well to design a compact radar which can fly on remotely piloted vehicles and measure winds, waves, and currents in denied coastal zones. The scientific objectives of this research are to understand the interaction of microwave radiation with the ocean surface at a variety of incidence angles and to apply this understanding to extract information about the airsea interface. This implies that we must understand the effects of intermediate-scale surface waves on backscatter over a wide range of incidence angles. Our results shed new light on microwave backscattering from the ocean under a variety of environmental and system conditions. Thus they are applicable to any microwave radar which senses the ocean surface. In particular, they promise to aid our understanding of the imagery of signatures of surface and subsurface vehicles, especially in the higher incidence angle region. They also indicate that a small, low-power, coherent radar system on a remotely piloted vehicle could potentially monitor ocean conditions along a hostile coastline. With the proper choice of dielectric constant, our results are also applicable to acoustic scattering from the airsea interface and could be used to model surface reverberation.
- Physical and Dynamic Oceanography
- Active and Passive Radar Detection and Equipment
- Radiofrequency Wave Propagation