Accession Number : AD0284951

Title :   THE ANNUAL AND DIURNAL VARIATION OF METEOR RATES IN THE SOUTHERN HEMISPHERE

Corporate Author : AIR FORCE CAMBRIDGE RESEARCH LABS L G HANSCOM FIELD MASS

Personal Author(s) : ELLYETT,C.D. ; KEAY,C.S.

Report Date : 04 MAY 1962

Pagination or Media Count : 1

Abstract : The results are given of a continuous survey of meteor rates for the year from February, 1960 to January, 1961. The omni-directional radar equipment used operated at a frequency of 69.5 megacycles, and was located near Christchurch, New Zealand. Extensive measures were adopted to ensure constancy of the equipment parameters and the elimination of sensitivity variations due to external noise, both man-made and natural. Meteors were recorded down to a limiting radio magnitude of +9.1, while the most frequently observed meteors were of radio magnitude +6.2. Echo rates as high as 200 per hour were often obtained. It is shown that reliable meteor rates can be obtained free from the influence of ionospheric effects. The dominating influence of the angle between the observing station and the apex of the earth's way is definitely established. (Author)

Descriptors :   *METEORS, DIURNAL VARIATIONS, ECHO RANGING, FREQUENCY, MEASUREMENT, NOISE, RADAR EQUIPMENT, SOUTHERN HEMISPHERE

Distribution Statement : APPROVED FOR PUBLIC RELEASE