Abstract

Bearing observations were made with an Adcock direction-finder on distant high-frequency transmitters at a rate of five per second. The auto-correlation function of the observations was calculated; the analytical formula found most useful as its representation was ε−τ/τ0, where the mean value of τ0 was 0·75sec with a standard deviation of 0·51 sec. Expressions are given for the reduction in the variance of bearing error to be obtained by time-averaging.

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