Polarization spectra of centimeter-wavelength solar bursts using whole-sun observations /
Donald A. Guidice.

Description

Main Author

Guidice, Donald A.

Related Names

U.S. Air Force Geophysics Laboratory.

Language(s)

English

Published

Hanscom AFB, Massachusetts : Air Force Geophysics Laboratories, Air Force Systems Command, United States Air Force, 1976.

Subjects

Spectrum, Solar.
Solar radiation.
Solar activity.
Radio waves.
Radio astronomy.
Electromagnetic waves > Electromagnetic waves / Polarization.
Radio astronomy.
Electromagnetic waves > Electromagnetic waves / Polarization.
Radio waves.
Spectrum, Solar.
Solar activity.
Solar radiation.

Summary

The physics of microwave-burst emission is briefly examined to give the rationale for investigating polarization spectra. The instruments used to carry out the 9.4 GHz and 7 GHz circular-polarization measurements and the 5 GHz Stokes-parameter measurements are described. A survey of the August 1972 to December 1973 period produced a table of 45 bursts, from which some limited results were obtained. About 75 to 80 percent of all bursts are circularly polarized, with varying polarization over the 5 to 9.4 GHz range. For most bursts where the circular polarization pc increases toward the upper or lower end of the 5 to 9.4 GHz range, the total intensity I also increases in that direction. The few bursts having a pc sense reversal in the 5 to 9.4 GHz range also have a spectral maximum of I at roughly the same frequency. Some simplified explanations of the results are presented.

Note

Research supported by the Air Force Geophysics Laboratory, Air Force Systems Command, United States Air Force, Hanscom AFB, Massachusetts.
Space Physics Division Project 4643.
ADA038782 (from http://www.dtic.mil).
"8 December 1976."

Physical Description

36 pages : illustrations ; 28 cm.

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