Results 31 to 40 of about 141,810 (209)

A Novel Ship Detector Based on the Generalized-Likelihood Ratio Test for SAR Imagery

IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing, 2017
Ship detection with synthetic aperture radar (SAR) images, acquired at different working frequencies, is presented in this paper where a novel technique is proposed based on the generalized-likelihood ratio test (GLRT).
Pasquale Iervolino, Raffaella Guida
doaj   +1 more source

Detection of Electronic Devices Using FMCW Nonlinear Radar

Sensors, 2022
Nonlinear radars can be utilized to detect electronic devices, which are difficult to detect with conventional radars due to their small radar cross sections (RCS).
Kyuho Cha, Sooyoung Oh, Hayoung Hong, Hongsoo Park, Sun K. Hong   +4 more
doaj   +1 more source

Feasibility study and design concept for an orbiting ice-penetrating radar sounder to characterize in three-dimensions the Europan ice mantle down to (and including) any ice/ocean interface [PDF]

, 1999
This report presents a radar sounding model based on the range of current working hypotheses for the nature of Europa's icy shell.Institute for ...
Blankenship, D.D., Edwards, B.C., Geissler, P.E., Gurnett, D., Johnson, W.T.K., Kim, Y., Kofman, W., Moore, J.C., Morse, D.L., Pappalardo, R.T., Picardi, G., Raney, R.K., Rodriguez, E.R., van Zyl, J., Weertman, J., Zebker, H.A.   +15 more
core   +1 more source

Low‐RCS High‐Gain Broadband Substrate‐Integrated Waveguide Antenna Based on Elliptical Polarisation Conversion Metasurface

IET Microwaves, Antennas & Propagation
An elliptical polarisation conversion metasurface (PCM) is proposed for Ka‐band applications, integrated with a high‐gain substrate‐integrated waveguide (SIW) antenna to achieve significant radar cross section (RCS) reduction.
Cuiqin Zhao, Dongya Shen
doaj   +1 more source

SNR‐dependent drone classification using convolutional neural networks

IET Radar, Sonar & Navigation, 2022
Radar sensing offers a method of achieving 24‐h all‐weather drone surveillance, but in order to be maximally effective, systems need to be able to discriminate between birds and drones.
Holly Dale, Chris Baker, Michail Antoniou, Mohammed Jahangir, George Atkinson, Stephen Harman   +5 more
doaj   +1 more source

Influence of grain size, shape and compaction on georadar waves: example of an Aeolian dune

, 2012
Many Ground Penetrating Radar (GPR) profiles acquired in dry aeolian environment have shown good reflectivity inside present-day dunes. We show that the origin of this reflectivity is related to changes in grain size distribution, packing and/or grain ...
Adetunji, Annan, Asami, Atkins, Bagnold, Bano, Bano, Bano, Barndorf-Nielsen, Bayard, Boyle, Bristow, Bristow, Bristow, Bruggeman, Costas, Davis, Greaves, Gómez-Ortiz, Hanai, Harari, Hunter, Jackson, Jean-Remi Dujardin, Jiao, Jol, Julien Guillemoteau, Koltermann, Lancaster, Lehmann, Maksim Bano, Marion, Maxwell-Garnett, McGeary, Mendelson, Mountney, Neal, Otto, Robinson, Robinson, Sen, Shenk, Sihvola, Stratton, Thomas, Von Hippel, Wang, Watson, Widess, Zeng   +49 more
core   +5 more sources

Hybrid Frequency‐Polarisation Coding Method for Chipless Radio‐Frequency Identification Tags With Angular Orientation

IET Microwaves, Antennas & Propagation
In this paper, a hybrid coding method for chipless radio‐frequency identification (RFID) tag with angular orientation is proposed. Frequency‐shift coding is achieved by controlling the size of three complementary split single ring resonators (CSSRR). And
Zilong Chen, Yang Yang, Xiaoxiang He, Shengchuan Xiao   +3 more
doaj   +1 more source

Radar Cross Section Lectures

, 1984
These notes were developed while the author was on Sabbatical at NASA Ames Research Center during FY 1982. The lectures were presented to engineers and scientists at NASA Ames in March-April 1982. In August 1982, the RCS lectures were presented at General Dynamics Fort Worth Division.
openaire   +2 more sources

A Study of Ineffective Investment Trust and Precious Metal Mining Issues [PDF]

, 1937
Inobject/target reconstruction and recognition based on laser radar data, the range value's accuracy is important. The range data accuracy depends on the accuracy in the laser radar's detector, especially the algorithm used for time-of-flight estimation.
Chevalier, Tomas, Grönwall, Christina, Gustafsson, Fredrik, Steinvall, Ove   +3 more
core   +1 more source

Aluminium Feeds for Reflector for NadirSAR [PDF]

, 2018
With the long term aim of developing a NadirSAR quadrotor UAV system specialized for monitoring broad acre grain fields, a large aperture load bearing antenna to use as the main structural element was sort.
Gray, Derek, Le Kernec, Julien
core   +1 more source