We present two stochastic filters for an FM-band passive air surveillance radar. The first system uses an extended Kalman filter and delay-Doppler measurements to track targets. The second system uses a particle filter to simultaneously track and classify targets. Automatic target recognition is made possible by the inclusion of radar cross section (RCS) in the measurement vector. The extended ...

In this paper, an analysis of a target location estimation system using the best linear unbiased estimator (BLUE) for high performance radar systems is presented. In synthetic environments, we are here concerned with three key elements of radar system modeling, which makes radar systems operates accurately in strategic situation in virtual ground. Radar Cross Section (RCS) modeling is used to d...

Radar signature data can be presented in one dimension, as a dBsm level as a function of vehicle aspect angle. In a synthetic aperture radar image, data is presented in a twodimensional image: as an intensity level represented by a color located in both vehicle down range and cross range. When the radar antennas are translated both vertically and horizontally, radar data is located three-dimens...

We have wrapped metallic cylinders with strongly absorbing metamaterials. These resonant structures, which are patterned on flexible substrates, smoothly coat the cylinder and give it an electromagnetic response designed to minimize its radar cross section. We compare the normal-incidence, small-beam reflection coefficient with the measurement of the far-field bistatic radar cross section of th...

Existing wind speed algorithms for satellite altimeters have been developed from data in the range 0 to 20 m/s. At higher wind speeds the available algorithms diverge alarmingly. By comparing Geosat altimeter values of the radar cross section with model predictions of the surface winds during satellite overpasses of tropical cyclones, a wind speed algorithm valid for wind speeds between 20 and ...

A bstnzct An airborne Ku-band scatterometer (NUSCAT) was used to measure ocean backscatters during the Surface Wave Dynamics Experiment (S WADE). The objective is to improve understanding of the relationship between ocean radar backscatter and near surface winds. BackScatter measurements are presented for Gulf-Stream boundary, low wind, and large wave effects. Over the boundary crossings, large...

A method for estimating the near-surface wind vector over water using the airborne weather radar in addition to its standard navigational application is discussed. A case of an airplane rectilinear flight over the water surface is considered. The radar operates in the ground-mapping mode in the range of middle incidence angles as a scatterometer. Wind vector is recovered from the azimuth normal...

In this paper, a new generalized maximum integration angle for ISAR imaging system before uncorrected rotation produces defocusing in cross-range is presented which is in terms of allowable two-way phase deviation. It is assumed that the radar is in the far field of the target so that no significant range deviation exists over the target’s cross-range extent. What remains is the range deviation...

This report describes the analysis of results of a Lincoln Laboratory experiment which consisted of a series of bistatic scatter and radar measurements of the scattering cross section per unit volume of rain and thin turbulent layers. Results of tbe experiment are presented as average and rms values of the ~ of the bistatic scatter cross section as calculated using the radar data to the cross s...