Physics
Scientific paper
Dec 1976
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1976nelc.rept.....o&link_type=abstract
Research and Development Report, May 1975 - Jun. 1976 Naval Electronics Lab. Center, San Diego, CA.
Physics
Polar Cap Absorption, Solar Flares, Solar Radio Emission, Ionospheric Disturbances, Ionospheric Propagation, Riometers
Scientific paper
Parent-flare 2.8-GHz event energy is correlated with peak riometer absorption for 47 Polar-Cap Absorption (PCA) events which occurred during the nineteenth and twentieth solar cycles. Thirty-two of these events had riometer absorption of or = 2.0 dB. The least-squares relationship between the peak absorption (A) and the burst energy (E) is given by A(dB) = 0.0116 E to the 0.5555 power with a coefficient correlation, R, of 0.59, where E is given in sfu-min. The peak absorption predicted by this formula is within a factor of 2 of that actually observed for 22 of the 32 principal PCA events (69 percent) and within a factor of 3 for 28 of the 32 events (88 percent). A correlation for the effect of the interplanetary magnetic field on particle propagation is considered in the appendix.
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