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Stereoscopic direction finding analysis of a type III solar radio burst - Evidence for emission at 2f/p-/Stereoscopic direction finding measurements from the Imp 8, Hawkeye 1, and Helios 2 spacecraft over base line distances of a substantial fraction of an astronomical unit are used to directly determine the three-dimensional trajectory of a type III solar radio burst. By comparing the observed source positions with the direct in situ solar wind plasma density measurements obtained by Helios 1 and 2 near the sun, the relationship of the emission frequency to the local plasma frequency can be determined directly without any modeling assumptions. These comparisons show that the type III radio emission occurs near the second harmonic of the local electron plasma frequency. Other characteristics of the type III radio emission, such as the source size, which can be obtained from this type of analysis, are also discussed.
Document ID
19780042177
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Gurnett, D. A.
(Iowa Univ. Iowa City, IA, United States)
Baumback, M. M.
(Iowa, University Iowa City, Iowa, United States)
Rosenbauer, H.
(Max-Planck-Institut fuer Physik und Astrophysik Institut fuer extraterrestrische Physik, Garching, Germany)
Date Acquired
August 9, 2013
Publication Date
February 1, 1978
Publication Information
Publication: Journal of Geophysical Research
Volume: 83
Subject Category
Solar Physics
Report/Patent Number
AD-A052297
Accession Number
78A26086
Funding Number(s)
CONTRACT_GRANT: NAS1-13129
CONTRACT_GRANT: NAS5-11279
CONTRACT_GRANT: NGL-16-001-043
CONTRACT_GRANT: NAS5-11431
Distribution Limits
Public
Copyright
Other

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