Conventional SAR resolution equations cannot be applied to ultrawideband ultrawidebeam systems, particularly, bistatic systems. This is because the dependence of system frequency response in range and across not considered. In this case, area resolution, i.e., cell, will an alternative. article introduces a new formula for systems based on relationship between radar signal frequency, range, cro...

Passive radars exploit the signal transmitted by other systems, known as opportunity illuminators (OIs), instead of using their own transmitter. Due to its almost total invulnerability to natural disasters or physical attacks, satellite OIs are of special interest. In this line, a feasibility study of Earth Observation Synthetic Aperture Radar (EO SAR) systems as OIs is carried out taking into ...

In this study, spatial separation of the radar transmitter and receiver units is considered, as a means reducing masking effect in noise radars. A bistatic system constructed, with emphasis on lightweight unit that can be mounted commercial Unmanned Aerial Vehicle (UAV). The uses pseudo-random noise, generated digitally at units. Correlation losses, due to non-linearities units, are measured 0....

The target tracking using multistatic passive radar in a digital audio/video broadcast (DAB/DVB) network with illuminators of opportunity faces two main challenges: the first challenge is that one has to solve the measurement-to-illuminator association ambiguity in addition to the conventional association ambiguity between the measurements and targets, which introduces a significantly complex t...

Introduction: An important goal in the in situ exploration of asteroids by spacecraft is the determination of not just the surface characteristics of a target asteroid, but also its interior structure, such as density, porosity and compositional changes at depth. Information about the complex dielectric constant along a raypath, which is related to these quantities, can be determined by monitor...

Using a far-field model, bistatic synthetic aperture radar (SAR) acquires Fourier data on a rather unusual, non-Cartesian grid in the Fourier domain. Previous image formation algorithms were mainly based on direct Fourier reconstruction to take advantage of the FFT, but the irregular coverage of the available Fourier domain data and the 2-D interpolation in the Fourier domain may adversely affe...

Backscattering enhancement phenomenon in a random medium is studied by numerically analyzing a bistatic radar cross-section of a circular cylinder, under the condition that the spatial coherence length of the incident waves around the cylinder is larger enough than the size of the cylinder. The numerical analysis shows that the phenomenon may occur not only in the backward direction but also in...