Accession Number:

AD0293834

Title:

OBSERVATIONS OF VLF RADIO NOISE AT GODHAVN GREENLAND

Descriptive Note:

Corporate Author:

TECHNICAL UNIV OF DENMARK COPENHAGEN

Personal Author(s):

• UNGSTRUP,EIGIL

Report Date:

1962-09-01

Pagination or Media Count:

1.0

Abstract:

Identifiers Whistlers.Audio frequency radio noise in the band from 0.5 to 15Kc has been recorded at Godhavn, Greenland since July 19, 1957. The equipment used was designed according to the IGY specifications. In the winter 1958-1959 it proved important to reduce the interference level because strong harmonics of the power frequency coincided with the frequency range of the observed chorus. The reduction in interference level was accomplished by moving the antenna further away from the ionosphere station. At the same time an increased sensitivity was obtained by using a transistorized preamplifier. The increase was of the order of 16 dB. The data taken from the start of the recordings and to the end of 1961 have been treated, and the occurrence of whistlers and the type of ionospheric noise named chorus as been studie . A UTHOR

Descriptors:

• *RADIO INTERFERENCE
• ANTENNA FEEDS
• CLIMATE
• IONOSPHERE
• NOISE ANALYZERS
• RADIOFREQUENCY POWER
• RECORDS
• SENSITIVITY
• SIGNAL GENERATORS
• GEOMAGNETISM

Subject Categories:

Distribution Statement:

APPROVED FOR PUBLIC RELEASE