Comparison of certain VLF noise phenomena with the lower hybrid resonance frequency calculated from simultaneous ion composition measurements
作者:
T. Laaspere,
H. A. Taylor,
期刊:
Journal of Geophysical Research
(WILEY Available online 1970)
卷期:
Volume 75,
issue 1
页码: 97-106
ISSN:0148-0227
年代: 1970
DOI:10.1029/JA075i001p00097
关键词: Ionosphere: Wave Propagation
数据来源: WILEY
摘要:
Certain VLF noise phenomena commonly observed with electric dipole antennas on the Alouette, OGO, and Injun 5 spacecraft have been associated with the lower hybrid resonance frequency of the ionospheric medium in the vicinity of the spacecraft. By using simultaneous VLF and ion mass spectrometer data from OGO 4, it has now become possible to compare the characteristic frequencies of these noise bands with the lower hybrid resonance frequencyfLHcalculated directly from ion composition measurements. The results of the study show a clear correspondence between the independent observations over a wide range of variation offLH. Some differences between the VLF and the spectrometer results are also evident and suggest that the characteristic frequencies of lower hybrid resonance noise phenomena observed by satellite‐borne VLF receivers may not always be determined in the immediate vicinity of the spacecraf
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