On a Sampling Error in Hailpad Measurements

E. Wirth Országos Meteorológiai Szolgálat, Pécs, Hungary

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Cs Zoltán Országos Meteorológiai Szolgálat, Pécs, Hungary

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Cs Székely Országos Meteorológiai Szolgálat, Pécs, Hungary

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Abstract

This note deals with a special type of error in hailpad measurements. We call it the “noise-type error” of the sampling, which originates from the finite area of the pad. It is Shown by a simple model, based on actual measurements, that the number of hailstones falling onto the surface of a hailpad follows a Bernouli distribution. By applying this distribution, a procedure is given for the estimation of the noise-type error. This error can cause discrepancies greater than 30% in the number of hailstones on the hailpad.

Abstract

This note deals with a special type of error in hailpad measurements. We call it the “noise-type error” of the sampling, which originates from the finite area of the pad. It is Shown by a simple model, based on actual measurements, that the number of hailstones falling onto the surface of a hailpad follows a Bernouli distribution. By applying this distribution, a procedure is given for the estimation of the noise-type error. This error can cause discrepancies greater than 30% in the number of hailstones on the hailpad.

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