Radar meteor rates and solar activity

Astronomy and Astrophysics – Astronomy

Scientific paper

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Diurnal Variations, Radio Echoes, Radio Meteors, Solar Activity Effects, Centimeter Waves, Geomagnetism, Sunspots

Scientific paper

The short-term variation of diurnal radar meteor rates with solar activity, as represented by the solar microwave flux, F(10,7), and the relative sunspot number, R(z), is investigated. Applying the superposed-epoch analysis to the observational material of radar meteor rates from Christchurch, New Zealand (1960-1961, 1963-1965), the recorded radar rates are found to decrease during days of enhanced solar activity. The Christchurch data reveal no dependence on geomagnetic activity. It is suggested that the absence of a geomagnetic effect on the radar meteor rates from New Zealand may derive from the lower echo ceiling height of the Christchurch radar. The variation in the atmospheric parameters as a possible explanation for the observed variation in the radar meteor rates is also discussed.

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