Abstract

At the echo rates practicable for a routine survey of meteor activity using a narrow-beam radio equipment, it is shown that the chief limitation to the recognition of weak shower activity is the fluctuations in the rate of detection of background (sporadic) meteors. Examination of echo rates obtained with the Adelaide 67 Mc/s equipment for December 1956 and January 1957 confirms that over short intervals of time the background fluctuations are random. A significance test, intended for use as a search method for weak shower activity and non-random fluctuations in the background activity, is then developed. This test, based on echo rates, is applied to the data for December 1956 and January 1957.

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