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| Titel |
Extension of MF radar tidal measurements to E-region heights (95-125 km): Saskatoon (52°N, 107°W), Canada |
| VerfasserIn |
S. P. Namboothiri, A. H. Manson, C. E. Meek |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
0992-7689
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| Digitales Dokument |
URL |
| Erschienen |
In: Annales Geophysicae ; 12, no. 4 ; Nr. 12, no. 4, S.333-341 |
| Datensatznummer |
250010685
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| Publikation (Nr.) |
 copernicus.org/angeo-12-333-1994.pdf |
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| Zusammenfassung |
| Efforts have been made to extend the MF radar
tidal profiles to E-region heights. The totally reflected MF radar echoes from
E-region heights during daytime are known to be group-retarded and the
corresponding wind and tidal data will have associated height discrepancies. The
estimation of the E-region real heights (Namboothiri et al., 1993), and
the elimination of the data for which the group retardation is significant, are
selected as the basic criteria to extend the tidal profiles to 100-125 km. The
analysis of the quiet (Ap<19) days of the winter and summer
seasons of 1988/89 shows that the tidal propagation continues to higher
altitudes with some changes in their pattern, e.g. longer wavelengths, compared
to that in the lower altitudes. Comparison with the model profiles shows some
resemblance and some disagreements. The reliability of the MF radar tidal
measurements of E-region heights and the propagation of tides in this region
have been discussed in the light of existing theories and other experimental
observations. It is concluded that, based on the initial studies with UHF and MF
systems and within the limits of the available theories, the information on
tides presented here for the 100-125 km region using the MF radar observations
is useful. Suggestions for future work in this direction are also given. |
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