Physics
Scientific paper
Jan 1968
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1968jatp...30...47c&link_type=abstract
Journal of Atmospheric and Terrestrial Physics, vol. 30, no. 1, pp. 47-54
Physics
Scientific paper
The day-to-day variations of the daytime F-region electron density at four representative magnetic dip zones, namely 0-5, 25-30, 45-50 and 65-70, are investigated in relation to the other geophysical parameters such as the temperature of the neutral atmosphere, the daily sum of the planetary magnetic indices ([Sigma] Kp) and the 10.7 cm solar flux. For this purpose, the plasma frequencies at 1000 km (JFOS) and the critical frequencies (JFOF2) obtained from the Alouette I satellite and the neutral temperatures derived from the Explorer IX satellite drag data over a six month period from October 1962 to March 1963 are used. In general, it is found that the day-to-day variations of JFOS and JFOF2 in the daytime follow the corresponding variations of the neutral temperature and [Sigma] Kp. This trend is not evident with 10.7 cm flux. Correlation coefficients obtained between JFOS, JFOF2 vs. temperature and vs. [Sigma] Kp show a marked latitudinal dependence. Some of the implications of the results obtained in the present investigation are discussed.
Chandra Sharat
Krishnamurthy B. V.
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