Accession Number : AD0711398

Title :   POLARIZATION MEASUREMENTS OF SOLAR TYPE III RADIO BURSTS AT 25.3 MHz,

Corporate Author : STANFORD UNIV CALIF INST FOR PLASMA RESEARCH

Personal Author(s) : Chin,Y. C. ; Fung,P. C. W. ; Lusignan,B. B.

Report Date : NOV 1969

Pagination or Media Count : 42

Abstract : Reported are the results of 1966, 1968, and 1969 polarization measurements of Solar type 3 radio noise bursts made by recording the output of two orthogonally polarized receiving channels and subsequent digital processing of selected data. The processed data yield total intensity, degree of polarization, ellipticity, and polarization ellipse orientation at 1 second intervals. The measurements are made in a 100 Hz bandwidth to minimize the influence of the propagating medium on the measurements. The mean degree of polarization was found to be about 65% in contrast to previous studies which indicated that type 3 events were more weakly polarized. By assuming that type 3 bursts are flare related we study the polarization characteristics of type 3 bursts as a function of the solar longitude of the related flares. The relation between type 3 event polarization characteristics and flare importance is also investigated. The significance of polarization measurements in studies of solar radio events is pointed out and relevant suggestions for further theoretical research are given. (Author)

Descriptors :   (*SOLAR DISTURBANCES, EXTRATERRESTRIAL RADIO WAVES), (*EXTRATERRESTRIAL RADIO WAVES, POLARIZATION), INTENSITY, SOLAR FLARES, MAGNETIC FIELDS, NARROWBAND, RADIO ASTRONOMY, SOLAR CORONA

Subject Categories : Astrophysics

Distribution Statement : APPROVED FOR PUBLIC RELEASE