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An investigation of mechanisms other than lightning to explain certain wideband plasma wave bursts detected in the Venusian nightside ionosphereSeveral related topics are briefly discussed. Reviewed here is work on an investigation of plasma wave phenomena associated with the question of lightning on Venus. The work supported the contention that lightning is at least a candidate explanation for many of the 100 Hz-only Pioneer Venus orbital electric field detector (OEFD) signals. A review of the work on the investigation of mechanisms other than lightning to explain certain wideband plasma wave bursts detected in the Venusian nightside ionosphere is given. A summary is given of our analysis of data from 23 OEFD observing periods as well as a discussion of the properties of specifically multifrequency events. Our opportunity to work on this topic was not sufficient to draw any firm conclusions about the origins of the multifrequency bursts, but we call attention to what we consider to be several candidate sources. Also discussed are case studies to test for evidence of whistler mode propagation from subionospheric sources, results of a search for dispersive effects in the OEFD data, the results for a search for simultaneous 100 Hz and 730 Hz observations at altitudes below 150 km, changes with altitude in dispersive broadening effects in the time signatures of 100 Hz bursts, and a survey of activity at altitudes above 1000 km.
Document ID
19920015930
Acquisition Source
Legacy CDMS
Document Type
Contractor Report (CR)
Authors
Carpenter, D. L.
(Stanford Univ. CA, United States)
Date Acquired
September 6, 2013
Publication Date
January 1, 1992
Subject Category
Lunar And Planetary Exploration
Report/Patent Number
NASA-CR-190127
NAS 1.26:190127
Report Number: NASA-CR-190127
Report Number: NAS 1.26:190127
Accession Number
92N25173
Funding Number(s)
CONTRACT_GRANT: NAG2-520
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.
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