Computer Science – Sound
Scientific paper
Jul 1978
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1978jatp...40..785k&link_type=abstract
Journal of Atmospheric and Terrestrial Physics, vol. 40, July 1978, p. 785-792.
Computer Science
Sound
Ionospheric Sounding, Radar Measurement, Sky Waves, Sporadic E Layer, Temperate Regions, Annual Variations, Diurnal Variations, Ionospheric Drift, Ocean Surface, Sweden, Wind Shear, Yagi Antennas
Scientific paper
Using a swept-azimuth skywave backscatter sounder, a study was made of the temperate-latitude sporadic-E at Uppsala, Sweden during the 1969-1975 period. The data suggest that: (1) a pronounced maximum occurs during the summer months, i.e., May through August, (2) sporadic-E activity occurs about 1% of the time and is primarily located towards the west of Uppsala, (3) the diurnal occurrence shows a peak during the nighttime at about 2000 LT, (4) the sporadic-E echoes usually occur over the Atlantic ocean rather than over land surfaces, (5) although about 50% of the sporadic-E patches disappear within an hour after formation, a substantial amount remains for up to four hours, and (6) the sporadic-E patches primarily drift to the west with an average speed of about 50 m/s.
Derblom Harald
Kolawole L. B.
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