September 1970 | NTIA Technical Memo ESSA ERLTM-ITS 253

Amplitude and Time Statistics for Atmospheric Radio Noise

L. Roger Espeland; Arthur D. Spaulding

Abstract: Typical amplitude and time statistics of atmospheric radio noise for the four seasons, spring, summer fall, and winter, are given. The statistics were obtained from detailed computer analysis of high-dynamic range tape recordings of the noise process, Morning, afternoon, and nighttime noise is covered at frequencies of 250 kHz, 500 kHz, 2.5 MHz, and 5 MHz in a 4 kHz bandwidth, The statistics presented are the amplitude probability distribution of the noise envelope, the average envelope crossing rate characteristics, pulse internal, and pulse duration distributions. All levels are given in absolute terms.

Keywords: atmospheric noise; amplitude probability distribution; radio noise; noise characteristics

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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