Abstract

One year's data on radio pulse from EAS at three frequencies (46, 65, 110 MHz) from the Medicina array have been analysed. The dominance of the geomagnetic production mechanism is confirmed. The frequency spectrum between 46 and 65 MHz appears to be flat. The detected electric field strength Ev has been considered as a measure of primary particle energy, and its value is correlated to shower size N and particle density rho at 50 and 100 m from the shower axis in order to study AES longitudinal fluctuations. Errors on each measured quantity are discussed, and it is shown that fluctuations are present.

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