Accession Number : AD0428273

Title :   ELF AND VLF ATMOSPHERIC NOISE,

Corporate Author : DECO ELECTRONICS INC BOULDER COLO

Personal Author(s) : Maxwell,E. L. ; Stone,D. L.

Report Date : 10 JAN 1964

Pagination or Media Count : 59

Abstract : Various parameters of atmospheric noise have been measured over a wide frequency range (20 c/s to 50 kc/s) at a variety of geographic locations. Complete amplitude probability distributions were obtained as well as the average vertical electric field data, E(avg). Horizontal magnetic field data, H(avg), were also obtained. The amplitude probability distributions, APDs, provided an average to rms conversion factor that enabled E(avg) and H(avg) data to be converted to the more useful 6e9rms) and H(rms). Typical APDs are shown for Point Barrow, Alaska and Malta. Mean noise density values are given as a function of time block, season, and region and are compared with CCIR predictions. Standard deviations of the five minute averages are presented with probability plots of five minute averages. Finally, geographical variations are shown for data obtained over a wide latitude and longitude range. (Author)

Descriptors :   (*ATMOSPHERICS, MEASUREMENT), (*RADIOFREQUENCY INTERFERENCE, ATMOSPHERICS), EXTREMELY LOW FREQUENCY, VERY LOW FREQUENCY, INSTRUMENTATION, PROBABILITY, LIGHTNING, PROPAGATION, ELECTRIC FIELDS, MAGNETIC FIELDS

Distribution Statement : APPROVED FOR PUBLIC RELEASE