Results 41 to 50 of about 141,741 (141)

A radar-echo model for Mars [PDF]

open access: yes
Researchers developed a radar-echo model for Mars based on 12.6 cm continuous wave radio transmissions backscattered from the planet. The model broadly matches the variations in depolarized and polarized total radar cross sections with longitude observed
Moore, H. J., Thompson, T. W.
core   +1 more source

Simultaneous rocket and MST radar observation of an internal gravity wave breaking in the mesosphere [PDF]

open access: yes, 1986
In June, 1983, the Structure and Atmospheric Turbulence Environment (STATE) rocket and Poker Flat Mesophere-Stratosphere-Troposphere radar campaign was conducted to measure the interaction between turbulence, electron density and electron density ...
Balsley, B. B.   +3 more
core   +1 more source

Combination of mesoscale and synoptic mechanisms for triggering an isolated thunderstorm: Observational case study of CSIP IOP 1 [PDF]

open access: yes, 2007
Copyright @ 2007 AMSAn isolated thunderstorm formed in the southern United Kingdom on 15 June 2005 and moved through the area where a large number of observational instruments were deployed as part of the Convective Storm Initiation Project.
Alan Blyth   +35 more
core   +1 more source

Microwave scattering and emission properties of large impact craters on the surface of Venus [PDF]

open access: yes
Many of the impact craters on Venus imaged by the Magellan synthetic aperture radar (SAR) have interior floors with oblique incidence angle backscatter cross sections 2 to 16 times (3 dB to 12 dB) greater than the average scattering properties of the ...
Campbell, D. B.   +2 more
core   +1 more source

An online frequency allocation strategy for multi‐carrier radar against spot jammer

open access: yesIET Radar, Sonar & Navigation
Spot jamming poses a significant threat to radar detection due to its ability to rapidly intercept radar signals and emit high‐power interference. A novel Cognitive Multi‐Carrier Radar (CMCR) is proposed, which utilises a detection waveform comprising ...
Zhao Shan   +3 more
doaj   +1 more source

A New Target Radar Cross Section Based Passive Radar Surveillance Receiver Positioning Algorithm on Real Terrain Maps [PDF]

open access: yesRadioengineering, 2018
Placing surveillance receivers on passive radar systems is a complex task because of the dependence on third party vendors. This paper presents an efficient and robust algorithm for positioning passive radar surveillance receivers for the intended ...
B. Tuysuz
doaj  

A study of radar cross section measurement techniques [PDF]

open access: yes
Past, present, and proposed future technologies for the measurement of radar cross section were studied. The purpose was to determine which method(s) could most advantageously be implemented in the large microwave anechoic chamber facility which is ...
Mcdonald, Malcolm W.
core   +1 more source

Numerical study on signatures of atmospheric convective cells in radar images of the ocean

open access: yes, 1999
Current and wind variations at the ocean surface can give rise to a modulation of the sea surface roughness and thus become visible in radar images. The discrimination between radar signatures of oceanic and atmospheric phenomena can be quite difficult ...
Alpers   +13 more
core   +1 more source

An integral equation based numerical solution for nanoparticles illuminated with collimated and focused light [PDF]

open access: yes, 2009
To address the large number of parameters involved in nanooptical problems, a more efficient computational method is necessary. An integral equation based numerical solution is developed when the particles are illuminated with collimated and focused ...
Challener   +26 more
core   +2 more sources

Broadband RCS Reduction for Slot Array Antenna Using Polarisation Conversion Metasurface

open access: yesIET Microwaves, Antennas & Propagation
A polarisation conversion metasurface (PCM) is proposed to realise broadband radar cross section (RCS) reduction of a slot array antenna. The PCM's unit cell, whose polarisation conversion ratio (PCR) is more than 88% from 8.41 to 32.28 GHz under x‐and y‐
Weizhe Qu   +4 more
doaj   +1 more source

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