Abstract The Millstone Hill incoherent scatter radar operated during 21–25 September 1987 as part of the Lower Thermosphere Coupling Study (LTCS). During the daytime, local E and F-region correlation functions were obtained using a combination of multipulse and lag profile techniques, while during the night, spectral techniques were employed to probe the local and high-latitude F-region. Emphasis has been placed so far on the analysis of temperatures in the lower thermosphere over Millstone Hill which reveal an increase of about 60°K in the mean daytime temperature on the geomagnetically disturbed day, 25 September, relative to the previous quieter days. This is considered to be due to the transport of Joule heat from higher latitudes. Temperature oscillations of 40°K with a 12-hour period were observed on 23 and 25 September exhibiting downward phase propagation consistent with the characteristics of upward propagating semidiurnal tides from the lower atmosphere. Although large variability is noted from day to day, there is a general consistency with tidal theory predictions for those days when tidal oscillations are apparent.
High resolution observations of the lower thermosphere at millstone hill during the September 1987 LTCS campaign
Advances in Space Research ; 10 , 6 ; 277-280
1989-01-01
4 pages
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
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