Physics
Scientific paper
Jan 1968
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1968jatp...30...73t&link_type=abstract
Journal of Atmospheric and Terrestrial Physics, vol. 30, no. 1, pp. 73-84
Physics
3
Scientific paper
The period of the Faraday fading of 20 Mc/s satellite signals was plotted throughout 521 transits of three different satellites, at heights of 200-1600 km. From these plots the size and electron content of 2650 separate irregularities were determined. The calculated sizes were spread evenly over the observable range from 10 to 400 km. The irregularities were not field aligned, but were flattened vertically with a mean thickness of 0.4 times the horizontal size. They were more common during the day than at night. The number of irregularities observed at any height was proportional to the electron density at that height, suggesting that the percentage changes in electron density are approximately the same at all heights. These changes were generally between 1 and 10 per cent and were independent of the size of the irregularities. The changes in total content, of 0.1-10 per cent, were therefore proportional to size. The mean horizontal gradients in total content were independent of the size of the irregularity and of the time of day.
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