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2f p radio emission from the vicinity of the Earth's foreshock: WIND observations
Author(s) -
Reiner M. J.,
Kaiser M. L.,
Fainberg J.,
Desch M. D.,
Stone R. G.
Publication year - 1996
Publication title -
geophysical research letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.007
H-Index - 273
eISSN - 1944-8007
pISSN - 0094-8276
DOI - 10.1029/96gl00841
Subject(s) - foreshock , physics , interplanetary spaceflight , solar wind , interplanetary magnetic field , polarization (electrochemistry) , geophysics , linear polarization , magnetic field , seismology , geology , aftershock , optics , laser , chemistry , quantum mechanics
We analyze 2f p radio emission observed during a perigee pass in August 1995 when the WIND spacecraft was between 47 and 72 R E from Earth and upstream of the electron foreshock. The WAVES experiment on WIND measures the direction of arrival and complete polarization state of the 2f p radiation. We found no evidence for significant linear or circular polarization. For one period when we were able to utilize the direction finding capability to determine the actual 2f p source location, using an interplanetary shock as a diagnostic, the radio emitting region was confirmed to lie within the electron foreshock near the contact point. We indicate how such remotely observed 2f p emissions can be used to monitor the response of the electron foreshock to instantaneous changes in the interplanetary magnetic field.