A TECHNIQUE FOR PREDICTING THE ELECTROMAGNETIC ENVIRONMENT AT A SITE

摘要

This report contains the step-by-step procedures for applying the technique to obtain a measurement of the electromagnetic environment at a site with a minimum of actual field measure¬ment. The technique is based on the results of a study con¬ducted by Federal Electric Corporation for the Bureau of Ships, Shore Electronics Division;Code 423, Washington, D. C. De-toils of the study and the analysis leading to the development of this technique have been included in the final report de¬livered as a contractual requirement under Contract NObsr 91236.nThis technique has been designed to be used to determine whether an equipment planned for installation at a site can be expected to encounter interference from distant (on or off-base) transmitters, it is based on signal intensity behavior as a func¬tion of calendar time and frequency and produces results in the form of "the percentage of total time over the course of a year when the signal intensity for a given frequency received at a site, will be above a given level." By knowing the threshold level of the particular equipment being considered for instal¬lation, it is possible to determine whether the signal intensity.