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A synoptic study of TIDs observed in the United Kingdom during the first WAGS campaign, October 10–18, 1985
Author(s) -
Crowley G.,
McCrea I. W.
Publication year - 1988
Publication title -
radio science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.371
H-Index - 84
eISSN - 1944-799X
pISSN - 0048-6604
DOI - 10.1029/rs023i006p00905
Subject(s) - earth's magnetic field , context (archaeology) , doppler effect , azimuth , quiet , geology , geodesy , meteorology , geography , physics , astronomy , magnetic field , paleontology , quantum mechanics
The Leicester University HF Doppler system was operated in the United Kingdom during a 9‐day interval from October 10 to 18, 1985, as a part of the first campaign in the Worldwide Atmospheric Gravity Wave Study (WAGS). Both large‐scale and medium‐scale TIDs were observed, and the tristatic configuration of the Doppler network enabled the horizontal phase trace speeds and propagation azimuths of the waves to be calculated. Geomagnetic conditions ranged from quiet to moderately active. The wave parameters are discussed in the context of different geomagnetic activity levels, and the results are compared with those of previous workers. Clear differences exist in the characteristics of the observed TIDs in progressing from the intervals of lowest to highest geomagnetic activity. Under the conditions of highest geomagnetic activity the data are consistent with the presence of aurorally generated large‐scale waves.