Effects of the Use of Millimeter Waves on the Statistics of Writer-to-Reader Delays in Military Communications Systems

by William Sollfrey

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The distributions of the several time intervals which form the total message delay in the AUTODIN I military communications system are found from measured data. The handling delays at the destination station provide the greatest contribution to the total delay, and the interstation transit time provides the least. The rain rates required to produce an outage on certain millimeter-wave satellite links are found, and the distribution of the duration of such rates is also determined. These duration distributions are combined with the AUTODIN data, and show that during rain periods there are significant increases in Flash transit time delays, but slight to negligible effects on Flash total delay and on the transit or total delay for all messages. All effects are negligible on an annual average basis. Thus, delays are not a reason to forgo the several advantages of millimeter waves.

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