This work treats a problem arising in intelligent vehicles and highway systems (IVHS), specifically in automatic road following,collisionavoidance, and maneuver control. A millimeter-wave radar is placed on the front of the vehicle and an image of the radar backscatter of the terrain is acquired in polar coordinates. This image contains both road and offroad scatter components which must be seg...

Polarimetric radar systems allow the flexibility of transmitting arbitrarily polarized waveforms that match the scattering profiles of the target. Since different types of targets have varying profiles, the advantages of a polarimetric radar system can fully be exploited only when the type of target is accurately estimated. However, accurate estimation requires a significant amount of training ...

This paper discusses a novel approach to associate and re ne aircraft track data from multiple radar sites. The approach provides enhanced aircraft track accuracy and time synchronization that is compatible with modern air tra c management analysis and simulation tools. Unlike existing approaches where the number of aircraft in the radar data must be assumed, this approach requires no such prio...

Alwina Enns,1 Thorsten W. Becker2 and Harro Schmeling1 1Institute of Meteorology and Geophysics, J. W. Goethe University, Feldbergstr. 47, 60323 Frankfurt am Main, Germany. E-mail: [email protected] 2Cecil H. and Ida M. Green Institute of Geophysics and Planetary Physics, Scripps Institution of Oceanography, University of California, San Diego, 9500 Gilman Drive, La Jolla CA 92093...

a Department of Geophysics, Faculty of Mathematics and Physics, Charles University, Prague, Czech Republic b now at Institute of Planetary Research, Department of Planetary Physics, German Aerospace Center (DLR), Berlin, Germany c Department of Geology and Geophysics, University of Minnesota, Minneapolis, MN 55455, USA d Minnesota Supercomputing Institute, University of Minnesota, Minneapolis, ...

Experience with the dynamics and data analyses for Earth and Moon reveals both similarities and differences. Analysis of Lunar Laser Ranging (LLR) data provides information on the lunar orbit, rotation, solid-body tides, and retroreflector locations. Lunar rotational variations have strong sensitivity to moments of inertia and gravity field while weaker variations, including tidal variations, g...

The manuscript presents an interesting and important study of retrieval cloud particles’ characteristics from differential reflectivity (ZDR) and the correlation coefficient (CC) measured with polarimetric radar operating at a frequency of 35 GHz. Two measured radar variables allow retrieving the dielectric axis ratio and degree of orientation of cloud ice particles. The paper is a substantial ...

The study of the collective effects of radar scattering from an aggregation of discrete scatterers randomly distributed in a space is important for better understanding the origin of the backscatter from spatially extended geophysical targets (SEGT). We consider the microstructure irregularities of a SEGT as the essential factor that affect radar backscatter. To evaluate their contribution this...

A computational efficient approach to identify very small mine-shaped plactic objects, e.g. M56 AntiPersonnel (AP) mines buried in the ground, is presented. The size of the objects equals the smallest AP-mines in use today, i.e., the most difficult mines to detect with respect to humanitarian mine clearance. Our approach consists of three stages, the phase stepped-fiequency radar method, genera...

This study develops a Gaussian mixture rainfall-rate estimator (GMRE) for polarimetric radar-based rainfall-rate estimation, following a general framework based on the Gaussian mixture model and Bayes least squares estimation for weather radar–based parameter estimations. The advantages of GMRE are 1) it is a minimum variance unbiased estimator; 2) it is a general estimator applicable to differ...