August 1974 | NTIA Technical Memo OT TM 74 177

Simulating atmospheric radio noise at 60 kHz, 200 kHz, and 5 HHz

Earl C. Bolton

Abstract: Due to seasonal variations of thunderstorm activity, and owing to the nonstationary conditions of atmospheric radio noise, it generally is not feasible to conduct performance tests of radio communications systems during periods of actual thunderstorm activity. Accurate simulation of desired conditions solves this difficulty. Magnetic tape recordings were made of atmospheric radio noise from low frequency through high frequency. The recordings were computer analyzed and were used as a model for the design of an atmospheric noise simulator. The simulation is valid and accurate for the limited available data base.

Disclaimer: Certain commercial equipment, components, and software may be identified in this report to specify adequately the technical aspects of the reported results. In no case does such identification imply recommendation or endorsement by the National Telecommunications and Information Administration, nor does it imply that the equipment or software identified is necessarily the best available for the particular application or uses.

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