The high data rate and advanced technology of modern radar systems make them attractive instruments for measuring the properties of random wave fields. When the objective is wave research, it is particularly important that the relation between wave field properties and radar output be clear and unequivocal. This is generally the case in the measurement of radar range (altimetry), the measuremen...

This paper is addressed to a design of K-band dual mode radar used in traffic information collection. The radar can work in both Frequency Modulate Continual Wave (FMCW) mode and Continual Wave (CW) mode. As VCO is seldom used as the oscillator in CW radar for velocity measurement, this paper studied the effect of phase noise and detecting distance on velocity error in CW mode in VCO design. Th...

The millimeter-wave radar observations of wintertime thunderstorms are compared with the Cband radar observations at Mikuni, Fukui. The difference between their echo intensities and the correlation between differential radial velocity and disturbance index are discussed in light of prediction of lightning discharges. The comparatively lower values of the millimeter-wave radar for the intense ec...

Remote sensing techniques enable the measurement of ocean wave fields with both high resolution and large coverage. As the acquisition of active radar data is independent of daylight and cloud conditions, these data are therefore believed to be most suited for operational use at weather centers and governmental agencies, as well as for many ongoing scientific investigations. In the present over...

Recent developments of wave polarization effects in radar remote sensing are summarized in historical sequence resulting in Radar Polarimetry, Radar Interferometry and Polarimetric SAR Interferometry, which represent the current culmination in airborne and space borne ‘Microwave Remote Sensing’ technology. Whereas with radar polarimetry the textural fine-structure, target orientation, symmetrie...

The CUTLASS Finland HF radar has been operated in conjunction with the EISCAT Tromsù RF ionospheric heater facility to examine a ULF wave characteristic of the development of a ®eld line resonance (FLR) driven by a cavity mode caused by a magnetospheric impulse. When the heater is on, striating the ionosphere with ®eld-aligned ionospheric electron density irregularities, a large enough radar ta...

A new radar imaging model of ocean current features is proposed. The simulated normalized radar cross section (NRCS) takes into account scattering from “regular” surfaces (by means of resonant Bragg scattering and specular reflections) and scattering from breaking waves. The description of background wind waves and their transformation in nonuniform medium is based on solution of the wave actio...

Abstract In this paper, a flexible bianisotropic metasurface possessing omega-type coupling is presented. The designed behaves differently when excited from either forward (port 1) or back 2) sides. It provides an absorption of 99.46% at 15.1 Gigahertz (GHz), illuminated port 1, whereas, on simultaneous illumination 2, it like partially reflective surface (PRS). Furthermore, the presented not o...

A review of the use of millimetre wave radar for robotic applications is presented. The paper includes a brief overview of the different radar and scanner technologies that are available and finishes with a review of some of the techniques that can be used to represent and use radar data.