Abstract
Abstract : An airborne man-made radio noise model has been developed and programmed on a graphics computer at the Naval Ocean Systems Center. This model provides a useful approximation to the geographical dependence of airborne man- made radio noise in the continental United States. Radio noise maps produced from this model are used to evaluate the effect of man-made radio noise on the operation of meteor burst communication systems. Equations developed by Skomal (E. N. Skomal, Man-Made Radio Noise, Van Nostrand Reinhold Co., New York, 1978) are used to construct the model. Two parametric equations are used to model the height gain of man-made radio noise as a function of distance, 0 to 150 miles, from the source. Coefficients for these equations are calculated from data measured over Seattle (W. E. Buehler and C. D. Lunden, IEEE Trans. Electromagnetic Compatibility, EMC-8, 143-152, 1966). Two hundred of the nation's largest cities and 62 of the largest counties and military installations are used as sources of radio noise in the computer program. Day and nighttime contours can be produced in the 25 to 75 MHz range for altitudes between 30 and 70 thousand feet.
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