Results 41 to 50 of about 141,810 (209)

Ocean Surface Cross Section for Bistatic HF Radar Incorporating a Six DOF Oscillation Motion Model

open access: yesRemote Sensing, 2019
To investigate the characteristics of sea clutter, based on ocean surface electromagnetic scattering theory, the first- and second-order ocean surface scattering cross sections for bistatic high-frequency (HF) radar incorporating a multi-frequency six ...
Guowei Yao, Junhao Xie, Weimin Huang
doaj   +1 more source

Combined EISCAT radar and optical multispectral and tomographic observations of black aurora [PDF]

open access: yes, 2008
Black auroras are recognized as spatially well-defined regions within a uniform diffuse auroral background where the optical emission is significantly reduced.
Blixt, E. M.   +5 more
core   +1 more source

Statistical analysis of the radar cross section of two small fixed‐wing drones using typical flights

open access: yesIET Radar, Sonar & Navigation
The presence and importance of small drones (unmanned aerial vehicles) are increasing. With traditional radar detection the target radar cross section and its statistical properties are needed in order to design the detector and to assess detection ...
Svante Björklund, Harald Hernnäs
doaj   +1 more source

The Radar Coverage Estimation under Multiple Antennas and Targets

open access: yesZanco Journal of Pure and Applied Sciences, 2019
Choosing the suitable antenna type for a particular application has importance in meeting the desired system objects. In this paper the comparative studies between three different types of antenna, which are phased array, planar array and parabolic ...
Arazoo Mustafa Aziz
doaj   +1 more source

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

Radar cross section (RCS) measurements [Testing ourselves]

open access: yesIEEE Antennas and Propagation Magazine, 2013
The radar cross section (RCS) is a critical parameter that describes the electromagnetic wave – target interaction. Its accurate prediction has long been a hot research and engineering topic. Today, RCS prediction of real targets is achieved via either numerical simulations or measurements. Here, indoor RCS measurements are reviewed in a tutorial.
Sevgi, Levent   +2 more
openaire   +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

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