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In this paper, near field imaging is achieved by using near field to far field transformation. We use CST to simulate and calculate the near field scattering data of the target, and utilize planar near field to far field transformation to get far field scattering data. Then Range-Doppler algorithm is put into use to calculate the image of the targets.
When using the Method of Moment (MoM) and MLFMA to calculate the scattered field of the perfect electric conductors (PEC), it is hard to calculate monostation RCS in case of the targets with electrically extreme large size. In this paper, an efficient numerical modeling method of monostation RCS for electrically extreme large PEC targets has been proposed based on the phase extracted basis functions...
In this paper, we report a new approach of modeling anisotropy snowpack using bicontinuous media [1, 2]. We then extract the uniaxial effective permittivity of the anisotropic bicontinuous media by numerical solving Maxwell's equation in 3D (NMM3D) over spherical samples of the media extending a few wavelengths. The effective permittivity is then extracted by comparing the coherent scattering field...
In this paper, we study backscattering from the ocean using 3D numerical simulation of Maxwell's equation (NMM3D). Previously we used NMM3D to compute backscattering and emissivity of rough soil surfaces for active and passive microwave remote sensing of soil moisture [1, 2] at L, C, X and Ku bands. The computed results were in excellent agreement with measurement data for co- and cross-polarizations...
Deviation in ISAR images is inevitable, especially for the phase part. Pulse compression is the key process in ISAR Imaging, which is also the source of deviation. Focusing on direct intermediate frequency sampling data obtained from LFM (linear frequency modulation) signal, this paper carefully analyzes the process of matched filtering, the source of deviation in HRRP (high resolution range profile),...
Wake vortex is a kind of largely-scaled distributed complex objects, and its radar scattering characteristics are very difficult to analysis. Generally, wake vortex can be classified into two categories in terms of weather conditions: clear air condition and precipitation condition (fog, rain, snow). Different wake vortices have different scattering mechanisms and characteristics. This paper presents...
The partially coherent approach of dense media radiative transfer (DMRT) has been extensively applied to study the wave propagation and scattering inside dense media such as terrestrial snow [1–5]. In the DMRT partially coherent approach, the coherent part is obtained by solving Maxwell's equations over several cubic wavelengths of statistically homogeneous snow volume to compute the phase matrix,...
Combined active and passive microwave remote sensing of vegetated surfaces is of great interest and importance given the increasing number of active and passive satellite microwave missions and datasets available for studies in land surfaces for application in hydrology and terrestrial ecology [1]. For many years, passive microwave retrieval algorithms for satellite missions such as AMSR-E, SMOS,...
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