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Remote radio tracking of interplanetary CMEsTwo examples of type 2 radio emissions associated with the propagation of earth-directed coronal mass ejections (CMEs) through the interplanetary medium are illustrated and compared. The two type 2 radio events were observed by WIND/WAVES in January and May of 1997 and exhibit very different radio characteristics. The analyses presented here use the novel approach of presenting the radio data as a function of the inverse of the frequency and time, which facilitates remote radio tracking of the CME through the interplanetary medium. It is demonstrated unequivocally that for the May 1997 event, the radio emissions were generated at the fundamental, and harmonic of the plasma frequency in the ambient plasma upstream of the CME-driven shock. For the January 1997 event, evidence is presented that some of the radio emissions were generated while the CME-driven shock passed through a corotating interaction region (CIR). This is the first time that type 2 radio emissions were shown to originate in a specific interplanetary structure.
Document ID
19990056484
Acquisition Source
Goddard Space Flight Center
Document Type
Conference Paper
Authors
Reiner, M. J.
(Hughes STX, Inc. Lanham, MD United States)
Kaiser, M. L.
(NASA Goddard Space Flight Center Greenbelt, MD United States)
Fainberg, J.
(NASA Goddard Space Flight Center Greenbelt, MD United States)
Bougeret, J.-L.
(Observatoire de Paris-Meudon France)
Stone, R. G.
(NASA Goddard Space Flight Center Greenbelt, MD United States)
Date Acquired
August 19, 2013
Publication Date
December 1, 1997
Publication Information
Publication: Proceedings of the 31st ESALB Symposium on Correlated Phenomena at the Sun, in the Heliosphere and in Geospace
Subject Category
Solar Physics
Funding Number(s)
CONTRACT_GRANT: NSF ATM-97-13422
Distribution Limits
Public
Copyright
Other
Document Inquiry

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