Accession Number : ADD011564

Title :   Pseudo Atmospheric Noise Generator having Variable Amplitude Probability Distributions and Discharge Fine Structure.

Descriptive Note : Patent,

Corporate Author : DEPARTMENT OF THE NAVY WASHINGTON DC

Personal Author(s) : Cernius,R K ; French,D M ; Singer,P A ; Adrian,D J ; Parsons,D I

Report Date : 04 Sep 1984

Pagination or Media Count : 12

Abstract : A reliable, repeatable and stable VLF/LF atmospheric noise generator is capable of producing noise with known or givem amplitude probability distributions and temporal characteristics such as pulse duration, pulse spacing, pulses per unit time and the discharge fine structure between pulses. A pseudo random noise carrier signals is multiplied in a plurality of digital-to-analog converters with the discharge envelopes created in a plurality of interconnected discharge envelope generators. The discharges are representative of cloud-to-ground discharges, intercloud discharges, the discharge rate, strokes per discharge and the discharge fine structure. All of the discharges are readily modifiable by suitably reprogramming operatively coupled memories and microprocessors in accordance with selected loading instructions. (Author)

Descriptors :   *Patents, *Noise generators, *Pseudo noise systems, *Atmospherics, Probability distribution functions, Amplitude, Microprocessors, Computer programming, Digital to analog converters, Low frequency, Very low frequency, Clouds, Electric discharges, Background noise, Impulse noise, Simulators, Tables(Data)

Subject Categories : Atmospheric Physics
      Acoustic Detection and Detectors

Distribution Statement : APPROVED FOR PUBLIC RELEASE