Accession Number:

ADA248260

Title:

Global Measurements of Low-Frequency Radio Noise

Descriptive Note:

Final rept. 1 Mar 1981-31 Oct 1989

Corporate Author:

STANFORD UNIV CA SPACE TELECOMMUNICATIONS AND RADIOSCIENCE LAB (STAR)

Report Date:

1992-02-01

Pagination or Media Count:

16.0

Abstract:

We report illustrative results obtained by Stanford Universitys global survey of ELFVLF radio noise frequencies in the range 10 Hz - 32 kHz. Particular comparison is made between the noise measurements made at high polar latitudes with those at lower latitudes. Although most of the natural ELFVLF noise observed everywhere in the world is lightning-generated, the high- latitude noise often contains additional components that are of magnetospheric origin. In the data we have examined, this noise consists predominantly of polar chorus, which is concentrated in the range 300 Hz-2 kHz. It produces a characteristic signature in the noise statistics. Less frequent occurrences of broad-band auroral hiss can occasionally mask most or all of the lightning- generated noise in the ELFVLF range.

Subject Categories:

  • Radio Communications

Distribution Statement:

APPROVED FOR PUBLIC RELEASE