A model of radar imaging of ocean phenomena is proposed. This model is an extension of the background NRCS model [7] in the case of non-uniform medium. Radar scattering component takes into account Bragg and non-Bragg (specular reflections and impact of wave breaking) scattering mechanisms. Varying surface current, surface temperature and surfactants are the main sources of medium non-uniformit...

With the demand for larger bandwidths and faster data speeds, wireless communication systems are expanding into the millimeter wave and terahertz region of the electromagnetic spectrum. Successful transition to higher frequencies, particularly for systems located in urban or indoor environments, will require a thorough understanding of the reflection, transmission, absorption, and scattering of...

Commercial X-band marine radar which original used for ship navigation purpose is now developed as a remote sensing technique for ocean wave and current measurements. This paper presents the coastal wave and current distribution extracted from marine radar image sequences. The spatial current results from radar are verified by in-situ current data measured by GPS drifting buoy. The result shows...

This paper proposes a new method for improving Signal-to-Clutter Ratio (SCR) for millimeter wave Frequency-Modulated-Continuous-Wave (FM-CW) radar. Received echoes of FM-CW radar can be categorized into two types due to either a target or clutter. Generally, the target received data have a stronger correlation with respect to different carrier frequencies than that of the clutter received data....

HF radar systems are widely and routinely used for the measurement of ocean surface currents and waves. Analysis methods presently in use are based on the assumption of infinite water depth, and may therefore be inadequate close to shore where the radar echo is strongest. In this paper, we treat the situation when the radar echo is returned from ocean waves that interact with the ocean floor. S...

We propose a scheme for localizing an atom in a four-level configuration inside a classical standing wave field, conditioned upon the measurement of frequency of a weak probe field. In the classical standing wave field, the interaction between the atom and the field is position dependent due to the Rabi-frequency of the driving field. Hence, as the absorption frequency of the probe field is mea...

In this research work cobalt-ferrite (CoFe2O4) nanoparticles were synthesized by a simple, general sol-gel auto-combustion method. For this study, electromagnetic (EM) wave absorbing coatings with different weight fractions of nano-carbon and CoFe2O4 (which, arises from both dielectric and magnetic contributions) and polymeric epoxy resin were prepared and their characteristics were fully inves...

A new solid state Frequency Modulated Continuous Wave (FMCW) cloud radar operating at 94GHz has been developed in the UK by the STFC Rutherford Appleton Laboratory, for the UK Met Office. This vertical-profiling cloud radar incorporates technological and operational advances over a previous demonstration instrument, which operated at 78GHz. In addition to providing independent high spatial (ord...

The subsurface radar suffers from strong clutter from surface and severe wave attenuation in the underground. This paper presents a unique countermeasure to these problems using a polarimetric FM-CW radar equipped with equivalent time sensitivity control (STC) technique. We first apply the polarimetric filtering principle to suppress surface clutter, then, use an equivalent STC technique suited...

The Electromagnetic Time Reversal (TR) technique is based on the time invariance property of electromagnetic waves. For every forward electromagnetic wave, there exist a back propagating wave which follows the same path. If the medium has less loss and is inhomogeneous, then TR provides better crossrange resolution. The purpose of this paper is to showcase the improved properties of TR and its ...