Results 211 to 220 of about 27,633 (255)
Some of the next articles are maybe not open access.
Wind velocity and cross polarization radar backscatter
2014 IEEE Geoscience and Remote Sensing Symposium, 2014Several papers highlighting the monotonic increase (with respect to wind speed) of the cross polarization radar backscatter (σ 0VH or VH for shorthand in the text) from the ocean surface have been published recently (Hwang et al, 2010a, b; Vachon and Wolfe, 2011; Zhang et al., 2011).
Paul A. Hwang +2 more
openaire +1 more source
A radar backscatter model for discontinuous coniferous forests
IEEE Transactions on Geoscience and Remote Sensing, 1991A radar backscattering model for low-to-medium-density woodland in which each tree is treated as an individual backscatterer is described. A forest stand viewed by radar is then an assemblage of scatterers standing on a background in a certain spatial pattern.
Guoqing Sun +2 more
openaire +1 more source
Journal of Atmospheric and Terrestrial Physics, 1985
Abstract This paper provides an overview of six poster presentations contributed to the Open Symposium on Active Experiments in Space Plasmas at the XXIst General Assembly of URSI. The six poster presentations deal with HF ionospheric modification and are primarily experimental in nature.
openaire +1 more source
Abstract This paper provides an overview of six poster presentations contributed to the Open Symposium on Active Experiments in Space Plasmas at the XXIst General Assembly of URSI. The six poster presentations deal with HF ionospheric modification and are primarily experimental in nature.
openaire +1 more source
Vibrational Radar Backscatter Communications
2021 55th Asilomar Conference on Signals, Systems, and Computers, 2021Jessica Centers, Jeffrey L. Krolik
openaire +1 more source
Evaluating Roughness Models of Radar Backscatter
IEEE Transactions on Geoscience and Remote Sensing, 1987A unique set of data collected for a soil moisture experiment has been used to evaluate three radar backscatter roughness models. The data were collected by the NASA Space Shuttle flight 41G (SIR-B) synthetic aperture radar (SAR) in an intensively farmed area near Fresno, California.
Edwin Engman, James Wang
openaire +1 more source
Studies of Enhanced Radar Backscatter.
1996Abstract : Since 1 October 1991, Dr Min-Chang Lee and his students at MIT and Boston Univ., have conducted experimental and theoretical research aimed at investigating ionospheric plasma disturbances which can significantly affect radio wave propagation from satellite communications systems.
openaire +1 more source
Backscatter-Modulation Semiconductor Laser Radar
SPIE Proceedings, 1989When a non-cooperative target is at a distance within the coherence length of a laser, the backscattered light induces modulation signals in the laser power output that can be used for velocimetry and ranging. Backscatter modulation in semiconductor laser diodes has had little practical impact in laser radar because the coherence length of these ...
Peter J. de Groot +4 more
openaire +1 more source
Multi-radar studies of auroral backscatter
Journal of Atmospheric and Terrestrial Physics, 1988Abstract Simultaneous observations of auroral irregularities in the E-region were made by the EISCAT incoherent scatter radar and two auroral radars—one at Karmaselga, operating at 46.5 MHz, and the other at Essoyla, operating at 93 MHz. A comparison of the measured strength of auroral backscatter with the values predicted by theory suggests that for
P.J.S Williams +3 more
openaire +1 more source
Radar backscattering from sea foam and spray
2013 IEEE International Geoscience and Remote Sensing Symposium - IGARSS, 2013A radar backscattering model of sea foam and spray is considered The model suggested is based on a modified Mie theory describing resonance scattering and adsorption effects from polydisperse systems of air bubbles (foam) and water droplets (spray) in a wide range of microwave frequencies.
openaire +1 more source
Radar Backscattering by Inhomogeneous Precipitation Particles
Journal of the Atmospheric Sciences, 1980Abstract Calculations of radar backscattering by inhomogeneous precipitation particles require values of the dielectric function of two-component mixtures. Four such dielectric functions are critically examined and their relative merits are weighed.
Craig F. Bohren, Louis J. Battan
openaire +1 more source