Results 141 to 150 of about 64,214 (203)

Radar ground clutter prediction

SPIE Proceedings, 2003
To investigate the potentiality of a radar ground prediction radar satellite data (SAR) have been studied for the generation of clutter estimation models. The generation of clutter statistics as well as scrutinized analysis of specific dependencies and influences of backscatter processes and behaviour is the basis for statistical clutter prediction ...
Rainer Wehrenberg, Dieter Rickenbrock
openaire   +1 more source

Radar ground-clutter shields

1965 Antennas and Propagation Society International Symposium, 1966
Metal shields (or fences) are useful in reducing the ground clutter received by a radar. The design of a clutter shield for an L-band monopulse radar employing a 60-ft parabolic reflector with Cassegrainian geometry is verified by scale-model measurements at K a -band.
J. Ruze, F.I. Sheftman, D.A. Cahlander
openaire   +1 more source

Weibull-Distributed Ground Clutter

IEEE Transactions on Aerospace and Electronic Systems, 1981
Weibull-distributed ground clutter of cultivated land was measured using an L-band long-range air-route surveillance radar (ARSR) having a 3.0 ?s pulsewidth and a 1.23° beamwidth at very low grazing angles between 0.21° and 0.32°. It is shown that the shape parameter of the Weibull distribution varied from c = 1.507 to c = 2.0, corresponding to the ...
M. Sekine, S. Ohtani, T. Musha, T. Irabu, E. Kiuchi, T. Hagisawa, Y. Tomita   +6 more
openaire   +1 more source

Cylindrical ground-clutter shield

IEEE Transactions on Antennas and Propagation, 1976
A theoretical investigation of the influence of metal shields on antenna radiation patterns is performed. This study allows us to determine the proper dimensions of a circular cylindrical finite perfectly conducting shield placed on the ground around infinitesimal sources located at its axis, in order to reduce the ground-side lobe.
C. Pereira, null Chen-To Tai
openaire   +1 more source

Ground Clutter In Optical Seekers

Optical Engineering, 1981
A new approach to the study of ground clutter radiation in electro-optical missile seekers has been developed that utilizes a comparison between seeker responses for artificial and measured infrared (IR) scenes. Seeker responses were statistically very much the same for both types of input except at a few isolated points thought to be the commonly ...
R. C. Anderson, P. R. Callary
openaire   +1 more source

Sea and ground radar clutter modeling

2008 IEEE Radar Conference, 2008
The modeling of the clutter echoes is a central issue for the design and performance evaluation of radar systems. The aim of this paper is to describe the state-of-the-art approaches to the modeling and understanding of land and sea clutter echoes and their implications on performance prediction and signal processors design.
Maurice W. Long, Maria S. Greco
openaire   +1 more source

Suppression of ground and weather clutter

IEE Proceedings F Communications, Radar and Signal Processing, 1981
It is shown that Weibull-distributed weather clutter obeys a Weibull distribution after passing through a moving target indicator (MTI) processor realised by a double canceller. Both ground and weather clutter can be thus suppressed by using the method of MTI and new Weibull constant false alarm rate (CFAR) systems.
M. Sekine, S. Ohtani, T. Musha, T. Irabu, E. Kiuchi, T. Hagisawa, Y. Tomita   +6 more
openaire   +1 more source

Statistical analyses of measured radar ground clutter data

IEEE Transactions on Aerospace and Electronic Systems, 1999
The performance of ground-based surveillance radars strongly depends on the distribution and spectral characteristics of ground clutter. To design signal processing algorithms that exploit the knowledge of clutter characteristics, a preliminary statistical analysis of ground-clutter data is necessary.
Billingsley, J. B., Farina, A., Gini, F., Greco, M. V., Verrazzani, L.   +4 more
openaire   +2 more sources