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Solar radio burst and in situ determination of interplanetary electron densityA few interplanetary electron density scales which were derived from the analysis of interplanetary solar radio burst are discussed and compared to a model derived from 1974 to 1980 Helios 1 and 2 in situ density observations made in the 0.3 to 1.0 AU range. The Helios densities were normalized to 1976 with the aid of IMP and ISEE data at 1 AU, and were then sorted into 0.1 AU bins and logarithmically averaged within each bin. The best fit to these 1976-normalized, bin averages is N(R(AU)) = 6.1 R(-2.10)/cu cm. This model is in rather good agreement with the solar burst determination if the radiation is assumed to be on the second harmonic of the plasma frequency. This analysis also suggests that the radio emissions tend to be produced in regions denser than the average where the density gradient decreases faster with distance than the observed R(-2.10).
Document ID
19830027718
Acquisition Source
Legacy CDMS
Document Type
Preprint (Draft being sent to journal)
Authors
Bougeret, J. L. (NASA Goddard Space Flight Center Greenbelt, MD, United States)
King, J. H. (NASA Goddard Space Flight Center Greenbelt, MD, United States)
Schwenn, R. (Max-Planck-Inst. fuer Aeronomie Katlenburg-Lindau, Germany)
Date Acquired
September 4, 2013
Publication Date
September 1, 1983
Subject Category
Space Radiation
Report/Patent Number
NAS 1.15:85094
NASA-TM-85094
Accession Number
83N35989
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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