The paper is devoted to design of impulse or equivalent ultra-wide band array antenna for subsurface radar system. Receiving elements of this antenna are arranged in array with small physical aperture and polarimetric features. Two transmitting element support two polarization states for radiating signals. The radar antenna provides down-looking scanning in subsurface medium for small areas cov...

Atmospheric phenomena often leave fingerprints on the sea surface, which are detectable by synthetic aperture radar (SAR). Here we present some representative examples of SAR images acquired by the Advanced Synthetic Aperture Radar (ASAR) onboard the Envisat satellite over the South China Sea (SCS) which show radar signatures of atmospheric gravity waves (AGWs) and of coastal wind fields. On SA...

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...

This paper looks at 3 different types of radar imaging systems; synthetic aperture radar (SAR), through-the-wall radar, and digital holographic near field radar. Each system surveyed experiments that improved the quality of the resulting image. It was found that each radar system has specific problems. The digital holographic near field radar imaging system was studied the closest. Findings rev...

This paper presents a new ground penetrating radar (GPR) design approach using orthogonal frequency division multiplexing (OFDM) and compressive sensing (CS) algorithms. OFDM technique is applied to leverage GPR operating speed with multiple frequency tones transmission and receiving concurrently, and CS technique allows utilizing reduced frequency tones without compromising data reconstruction...

The superpixel segmentation algorithm, as a preprocessing technique, should show good performance in fast segmentation speed, accurate boundary adherence and homogeneous regularity. A fast superpixel segmentation algorithm by iterative edge refinement (IER) works well on optical images. However, it may generate poor superpixels for Polarimetric synthetic aperture radar (PolSAR) images due to th...

Synthetic Aperture imaging techniques have been applied to Radar for several decades. The development of Synthetic Aperture Sonar (SAS) has been slow compared to the equivalent radar (SAR) systems. The large computation time needed for exact time domain inversion can be avoided by using one of a number of frequency domain techniques such as the Chirp Scaling or Range Doppler algorithms. Frequen...

In the areas with steep topography and vulnerable geological condition, landslide deformation monitoring is an important task for risk assessment and management. Differential Synthetic-Aperture Radar interferometry (D-InSAR) and Persistent Scatterer Interferometry (PS-InSAR) are two advanced SAR Interferometry techniques for detection, analysis and monitoring of slow moving landslides. The tech...

A hitchhiker is a passive radar receiver that relies on sources of opportunity to perform radar tasks.1–4 In this paper, we consider a synthetic-aperture radar (SAR) system with static non-cooperative transmitters and mobile receivers traversing arbitrary trajectories and present an analytic image formation method. Due to its combined synthetic aperture and hitchhiking structure, we refer to th...

Fully polarimetric Synthetic Aperture Radar (polSAR) data analysis has wide applications for terrain and ground cover classification. The dynamics of surface and subsurface water events can lead to slope instability resulting in slough slides on earthen levees. Early detection of these anomalies by a remote sensing approach could save time versus direct assessment. We used L-band Synthetic Aper...