Effects of power line radiation into the magnetosphere
Observations of the effects of VLF power line radiation on whistler-mode waves in the magnetosphere are reviewed. High-altitude OGO-3 spectral data reveal evidence of enhanced chorus activity over populated regions starting at harmonics of the power-line frequencies. Low-altitude Ariel 3 measurement...
Main Author: | |
---|---|
Format: | Other/Unknown Material |
Language: | unknown |
Published: |
1979
|
Subjects: | |
Online Access: | http://ntrs.nasa.gov/search.jsp?R=19800037029 |
id |
ftnasantrs:oai:casi.ntrs.nasa.gov:19800037029 |
---|---|
record_format |
openpolar |
spelling |
ftnasantrs:oai:casi.ntrs.nasa.gov:19800037029 2023-05-15T13:54:25+02:00 Effects of power line radiation into the magnetosphere Helliwell, R. A. Unclassified, Unlimited, Publicly available JAN 1, 1979 http://ntrs.nasa.gov/search.jsp?R=19800037029 unknown http://ntrs.nasa.gov/search.jsp?R=19800037029 Accession ID: 80A21199 Copyright Other Sources 46 Wave instabilities in space plasmas; July 31-August 8, 1978; Helsinki; Finland 1979 ftnasantrs 2012-02-15T14:17:36Z Observations of the effects of VLF power line radiation on whistler-mode waves in the magnetosphere are reviewed. High-altitude OGO-3 spectral data reveal evidence of enhanced chorus activity over populated regions starting at harmonics of the power-line frequencies. Low-altitude Ariel 3 measurements of 3.2 kHz noise intensity also indicate an enhancement of VLF activity over populated areas and their conjugates, however the relative importance of power line radiation, whistlers and spontaneous emissions is not known. The low-altitude polar-orbiting OGO-4 satellite also observed noise spectra at the harmonics of power line frequencies over industrial regions. Ground observations from Eights and Siple, Antarctica indicate that power line radiation effects on magnetospheric ducted paths peak at 3 kHz and near dawn, and exhibit a pronounced decrease on Sundays in the conjugate region, when power consumption is at a minimum. Experiments simulating power line radiation effects have also been performed. It is suggested that power line radiation effects magnetospheric activity by lowering the threshold for wave growth, with the localization of VLF sources acting to localize corresponding particle precipitation without necessarily affecting global average precipitation. Other/Unknown Material Antarc* Antarctica NASA Technical Reports Server (NTRS) Siple ENVELOPE(-83.917,-83.917,-75.917,-75.917) |
institution |
Open Polar |
collection |
NASA Technical Reports Server (NTRS) |
op_collection_id |
ftnasantrs |
language |
unknown |
topic |
46 |
spellingShingle |
46 Helliwell, R. A. Effects of power line radiation into the magnetosphere |
topic_facet |
46 |
description |
Observations of the effects of VLF power line radiation on whistler-mode waves in the magnetosphere are reviewed. High-altitude OGO-3 spectral data reveal evidence of enhanced chorus activity over populated regions starting at harmonics of the power-line frequencies. Low-altitude Ariel 3 measurements of 3.2 kHz noise intensity also indicate an enhancement of VLF activity over populated areas and their conjugates, however the relative importance of power line radiation, whistlers and spontaneous emissions is not known. The low-altitude polar-orbiting OGO-4 satellite also observed noise spectra at the harmonics of power line frequencies over industrial regions. Ground observations from Eights and Siple, Antarctica indicate that power line radiation effects on magnetospheric ducted paths peak at 3 kHz and near dawn, and exhibit a pronounced decrease on Sundays in the conjugate region, when power consumption is at a minimum. Experiments simulating power line radiation effects have also been performed. It is suggested that power line radiation effects magnetospheric activity by lowering the threshold for wave growth, with the localization of VLF sources acting to localize corresponding particle precipitation without necessarily affecting global average precipitation. |
format |
Other/Unknown Material |
author |
Helliwell, R. A. |
author_facet |
Helliwell, R. A. |
author_sort |
Helliwell, R. A. |
title |
Effects of power line radiation into the magnetosphere |
title_short |
Effects of power line radiation into the magnetosphere |
title_full |
Effects of power line radiation into the magnetosphere |
title_fullStr |
Effects of power line radiation into the magnetosphere |
title_full_unstemmed |
Effects of power line radiation into the magnetosphere |
title_sort |
effects of power line radiation into the magnetosphere |
publishDate |
1979 |
url |
http://ntrs.nasa.gov/search.jsp?R=19800037029 |
op_coverage |
Unclassified, Unlimited, Publicly available |
long_lat |
ENVELOPE(-83.917,-83.917,-75.917,-75.917) |
geographic |
Siple |
geographic_facet |
Siple |
genre |
Antarc* Antarctica |
genre_facet |
Antarc* Antarctica |
op_source |
Other Sources |
op_relation |
http://ntrs.nasa.gov/search.jsp?R=19800037029 Accession ID: 80A21199 |
op_rights |
Copyright |
_version_ |
1766260208165715968 |