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A theory of wave scatter from an inhomogeneous medium with a slightly rough boundary and its application to sea ice
| Content Provider | NASA Technical Reports Server (NTRS) |
|---|---|
| Author | Parashar, S. K. Moore, R. K. Fung, A. K. |
| Copyright Year | 1974 |
| Description | An analytical theory of electromagnetic wave scattering from an inhomogeneous medium with a slightly rough boundary surface is formulated. The inhomogeneity in the medium is assumed to vary continuously in the vertical direction and to have a small random variation in the horizontal direction. The medium is assumed to consist of two layers. Maxwell's equations are solved by using the small perturbation method together with Fourier transform technique. The resulting differential equations are solved by using WKB and variation of parameter methods. Field amplitudes in each medium are determined by taking boundary conditions into account. The expressions for first order polarized radar backscatter cross-section are obtained. An attempt is made to apply the developed theory to compute sea ice scatter. Numerical calculations are performed for polarized radar backscatter cross-section at two frequencies, 13.3 GHz and 400 MHz. It is shown that WKB method is applicable at both of these frequencies. Theoretical results are compared with the experimental results obtained from NASA Earth Resources Program mission 126. Theoretical results and experimental results are in good agreement. |
| File Size | 2164370 |
| Page Count | 26 |
| File Format | |
| Alternate Webpage(s) | http://archive.org/details/NASA_NTRS_Archive_19750018542 |
| Archival Resource Key | ark:/13960/t5w717k7x |
| Language | English |
| Publisher Date | 1974-12-01 |
| Access Restriction | Open |
| Subject Keyword | Oceanography Perturbation Theory Fourier Transformation Backscattering Radar Cross Sections Differential Equations Wave Scattering Electromagnetic Radiation Boundary Conditions Boundary Layers Sea Ice Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science |
| Content Type | Text |
| Resource Type | Technical Report |
