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Mariner 10 magnetic field observations of the Venus wakeMagnetic field measurements made over a 21-hour interval during the Mariner 10 encounter with Venus were used to study the down-stream region of the solar wind-Venus interaction over a distance of approximately 100 R sub v. For most of the day before closest approach the spacecraft was located in a sheath-like region which was apparently bounded by planetary bow shock on the outer side and either a planetary wake boundary or transient boundary-like feature on the inner side. The spacecraft made multiple encounters with the wake-like boundary during the 21-hour interval with an increasing frequency as it approached the planet. Each pass into the wake boundary from the sheath region was consistently characterized by a slight decrease in magnetic field magnitude, a marked increase in the frequency and amplitude of field fluctuations, and a systematic clockwise rotation of the field direction when viewed from above the plane of the planet orbit.
Document ID
19780004020
Acquisition Source
Legacy CDMS
Document Type
Preprint (Draft being sent to journal)
Authors
Lepping, R. P. (NASA Goddard Space Flight Center Greenbelt, MD, United States)
Behannon, K. W. (NASA Goddard Space Flight Center Greenbelt, MD, United States)
Date Acquired
September 3, 2013
Publication Date
August 1, 1977
Subject Category
Lunar And Planetary Exploration
Report/Patent Number
NASA-TM-78036
X-695-77-206
Accession Number
78N11963
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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