Physics – Space Physics
Scientific paper
Sep 1973
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1973ijrsp...2..196d&link_type=abstract
(National Physical Laboratory of India, Symposium on Aeronomy and Radio Wave Propagation, New Delhi, India, Feb. 14-20, 1973.) I
Physics
Space Physics
Microwave Emission, Radiant Flux Density, Solar Radio Bursts, Twenty-Seven Day Variation, Periodic Variations, Solar Flux Density, Solar Radio Emission, Solar Spectra
Scientific paper
Data on disturbed sun emission at different microwave frequencies observed at Sagamore Hill Solar Radio Observatory for a period of about 4 years have been examined in relation to their occurrences, peak flux values, energy excesses and spectral distributions. Important results obtained from the statistical analyses are: (1) spectrum of the average S-component shows a maximum at 4,995 MHz and is independent of the phase of the 27-day cycle, (2) occurrences of both the 'simple' bursts ('simple impulsive' and 'gradual rise and fall') are maximum at 4,995 MHz, and (3) spectra of majority of the 'inverted U' type of microwave bursts have the peak at 4,995 MHz. The analysis suggests that for the study of solar terrestrial phenomena the solar flux observation at 4,995 MHz would serve as a better index instead of at 2,800 MHz assumed till now to be a reliable index.
Das Gupta M. K.
Sarkar Sanat K.
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