Equatorial night-time spread-F characteristics observed from stations in the western Pacific

Details Equatorial night-time spread-F characteristics observed from stations in the western Pacific Equatorial night-time spread-F characteristics observed from stations in the western Pacific

Oct 1985

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985jatp...47.1023h&link_type=abstract

(IUGG, IAGA, USAF, et al., International Symposium on Equatorial Aeronomy, 7th, Hong Kong, Mar. 22-29, 1984) Journal of Atmosphe

Physics

Equatorial Atmosphere, Ionospheric Disturbances, Night Sky, Solar Activity Effects, Spread F, Ground Stations, Nocturnal Variations, Northern Hemisphere, Pacific Ocean, Southern Hemisphere, Sunspots

Scientific paper

A comparative study of the ionospheric spread-F observed at an equatorial station, Port Moresby (9 deg 24.5 min S, 147 deg 9.9 E; magn. dip lat. 18 deg S), Papua New Guinea, with corresponding data from the East Asian stations during a period May 27-June 19, 1983, as well as the same periods for 1981 and 1982, is presented. The Port Moresby spread-F condition is particularly outstanding and persistent at night and the occurrence of spread-F between 23 LT and 05 LT near June solstice is very high, reaching 100 percent of all observed nights. The latitudinal variation of nocturnal spread-F, its duration and connection with sunspot number are analyzed. The relationship between long-term variation of nighttime spread-F occurrence and solar activity during June and December solstices from 1954 up to 1984 at a typical lower magnetic latitudinal station, Wuhan (30 deg 32.7 min N, 114 deg 21.5 min E; magn. dip lat. 26 deg N) is also investigated.

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