CAOSP abstracts, Volume: 27, No.: 2, year: 1997
- Author(s): HAJDUK, A.; HANISKO, P.
- Journal: Contributions of the Astronomical Observatory Skalnate Pleso,
vol. 27, no. 2, p. 89-96.
- Date: 10/1997
- Title: Meteor head echoes from high power radar
- Keyword(s): METEORS, RADAR METEOR HEAD ECHOES, SPORADIC HEAD, ECHOES, APEX DEPENDENT
- Pages: 89 -- 96
Abstract:
Diurnal variation of meteor head echoes around the vernal and autumnal
equinox obtained from 1609 head echoes reduced from the original film records
of the Springhill Meteor Observatory high-power radar is analysed and
discussed. Occurence rate of head echoes in the sporadic periods is clearly
dependent on the apex motion by a factor of 5:1 during the vernal equinox days
and 2.5:1 during the autumnal equinox days. However, the level of the head
echo occurence in autumn is twice as high as in spring days. The radial
velocity distribution of head echoes implies two distinct velocity groups
centred at 15 km/s and 35 km/s, more pronounced in the spring sample. Possible
geometrical influences on the occurence of head echoes are discussed.
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