Microwave scattering and emission properties of large impact craters on the surface of Venus [PDF]
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
IET Radar, Sonar & NavigationSpot 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]
Radioengineering, 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]
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
, 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]
, 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
IET Microwaves, Antennas & PropagationA 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
Design of retrodirector arrays for laser ranging of satellites [PDF]
The radar equation for laser ranging of satellites is described and the effect of the velocity aberration explained. Equations for the cross sections of cube corners and arrays of cube corners are derived.
Minott, P. O.
core +1 more source
Preliminary comparison of 3.5-cm and 12.6-cm wavelength continuous wave observations of Mars [PDF]
Radar observations of Mars at Goldstone in 1990 were conducted by transmitting pure sinusoidal signals at 3.5-cm wavelengths and receiving the Doppler-spread echoes from Mars at Earth. Radar transmissions were circularly polarized and the echoes recorded
Jurgens, R. F. +4 more
core +1 more source
Macro aerodynamic devices controlled by micro systems [PDF]
, 1997 Micro-ElectroMechanical-Systems (MEMS) have emerged as a major enabling technology across the engineering disciplines. In this study, the possibility of applying MEMS to the aerodynamic field was explored.
Ho, C. M. +4 more
core +1 more source