September 1970 | NTIA Technical Memo ERL TM ITS 253

Amplitude and time statistics for atmospheric radio noise

L. R. 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.

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