Whereas C-band SAR data mainly provides information on the upper layer of land covers, properties of the lower surfaces can be captured using L-band SAR because of its higher capability of penetration. Moreover, optical imagery illuminates different characteristics of ground surfaces compared to radar images since they are obtained at different frequencies of the electro-magnetic spectrum. Henc...

II The millimeter-wave radar is a broadband, dual-polarized Cassegrain system operating in the Ka band (35 GHz) and W band (95 GHz). To upgrade system sensitivity and bandwidth, we replaced the 35-GHz microwave system with a reflecting beam waveguide (BWG), which is a quasi-optical system. This article describes the design and performance of the BWG retrofit. The goal is to increase sensitivity...

In a classical approach, optical data are being used for forest fire detection in a rush mode. Difficulties arise due to persistent cloud coverage, haze layers and smoke plumes. In contrast, radar measurements offer high acquisition rates because of their ability to penetrate clouds and their independence of sun illumination. However, a visual interpretation of radar data is generally less intu...

Gunshot detection, sniper localization, and bullet trajectory prediction are of significant importance in military and homeland security applications. While the majority of existing work is based on acoustic and electro-optical sensors, this paper develops a framework of networked radar systems that uses distributed radar sensor networks to achieve the abovementioned objectives. The use of radi...

A new, emerging area of application involves the adaptation of microwave techniques to optical systems, such as hybrid lidar-radar for detection of underwater objects, aerial turbulence and tumors in human tissues. Microwaves and millimeter waves do not penetrate water or tissue, but light at specified wavelengths does and therefore lidar has been used for detection of objects submerged in wate...

We evaluated the prospects of quantifying the parameterized post-Newtonian parameter β and solar quadrupole moment J2 with observations of near-Earth asteroids with large orbital precession rates (9 to 27 arcsec century). We considered existing optical and radar astrometry, as well as radar astrometry that can realistically be obtained with the Arecibo planetary radar in the next five years. O...

As active microwave instruments become more advanced and the application of radar images more proliŽ c there is an ever present need for a wider audience to appreciate the workings and subtleties of radar remote sensing systems. Many problems associated with the use and interpretation of such data are a consequence of users failing to properly conceptualise the radar system and the manner in wh...

The paper describes the use of radar data to detect curvilinear patterns around circular mounds in the Angkor region. The radar data was acquired with equipment of the National Aeronautics and Space Administration and the Jet Propulsion Laboratory. A three-component scattering model is used to assess the presence of water at mound sites. The sensitivity of the radar allows detection of inundate...

The Super-SVA algorithm has been shown effective for improving the resolution of microwave synthetic-aperture radar (SAR) In this paper we review the Super-SVA algorithm and demonstrate its application to optical imaging systems using coherent laser illumination. Examples of such imaging systems include heterodyne-array imaging, holographic laser radar, laser syntheticaperture radar, coherent p...

Remote sensing offers a cost efficient means for identifying and monitoring wetlands over a large area and at different moments in time. In this study, we aim at providing ecologically relevant information on characteristics of temporary and permanent isolated open water wetlands, obtained by standard techniques and relatively cheap imagery. The number, surface area, nearest distance, and dynam...