Now showing items 1-2 of 2
Isolated lower mesospheric echoes seen by medium frequency radar at 70º N, 19º E
(Journal article; Peer reviewed; Tidsskriftartikkel, 2006-11-23)
We have noted sporadic instances of strong isolated reflections of medium frequency (MF) radar waves from the mesosphere from as low as 50 km altitude and have devised a set of criteria for isolating these apparently anomalous echoes from those normally occurring from progressive partial reflections in the D-region. The object of this study is to map the occurrences of such echoes facilitating ...
Tidal signatures in mesospheric turbulence
(Journal article; Peer reviewed; Tidsskriftartikkel, 2006)
We search for the presence of tidal signatures in high latitude mesospheric turbulence as parameterized by turbulent energy dissipation rate estimated using a medium frequency radar, quantifying our findings with the aid of correlation analyses. A diurnal periodicity is not particularly evident during the winter and spring months but is a striking feature of the summer mesopause. While semidiurnal ...