Radio auroral scattering anisotropy inferred from 42 MHz polarization studies

Details Radio auroral scattering anisotropy inferred from 42 MHz polarization studies Radio auroral scattering anisotropy inferred from 42 MHz polarization studies

Dec 1976

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1976cajph..54.2435b&link_type=abstract

Canadian Journal of Physics, vol. 54, Dec. 15, 1976, p. 2435-2444. Research supported by the National Research Council of Canad

Physics

Backscattering, Faraday Effect, Polarization Characteristics, Radio Auroras, Radio Scattering, Anisotropy, Continuous Radiation, Electric Fields, Polarimeters

Scientific paper

Polarization measurements of 42.1-MHz CW backscatter made on two occasions during 1973-1974 are reported. When the orientation, ellipticity, and polarization ratio are plotted against intensity, they exhibit a more well-defined behavior at high intensities than at low intensities, so only the former case is discussed. The most striking feature of the results is that the received orientation is opposite to that expected on the basis of Faraday rotation, which implies that the scattering process must be an important factor in modifying the polarization state. To explain the results, a simple three-stage model of auroral backscatter is presented involving Faraday rotation on the way to the scatterer, anisotropic scattering, and equal Faraday rotation on the return path from the scatterer. Using the model, one must invoke an anisotropic scattering process which introduces a phase anisotropy of 180 deg between the electric-field components parallel and perpendicular to earth's field and an amplitude anisotropy ratio in the range 2:1 to 4:1 for these components, respectively. There is a received polarization ratio of about 0.95, which can be explained readily by introducing into the model some spread, both in the amplitude anisotropy of the scatterers and in the Faraday rotation, the latter spread being due to spatial separation of the scatterers.

Affiliated with

Also associated with

No associations

Rating

Radio auroral scattering anisotropy inferred from 42 MHz polarization studies does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Radio auroral scattering anisotropy inferred from 42 MHz polarization studies, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Radio auroral scattering anisotropy inferred from 42 MHz polarization studies will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1049319