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One of the experiments on the September 30, 1970, flight of RAM C-III vehicle consisted of an S-band system which was designed to provide diagnostic information about the electron density in the flow field. The level and distribution of electron density near the surface of the RAM vehicle was to be inferred by measuring the input admittance of the S-band antenna. Signal transmission was also monitored to infer integrated electron density.
The antenna consists of an aperture fed by a circular section of wave guide excited in the TEll mode. The design was based on the work of Bailey and Swift and was selected for a number of reasons to be discussed, the most pertinent of which was the desire to use an antenna which is amenable to theoretical analysis.
The first part of this paper is concerned with the Justification of the input admittance diagnostic method and a description of the flight systems. The latter part of the paper discusses preflight calculations and preliminary flight data.
Document ID
19710011634
Acquisition Source
Langley Research Center
Document Type
Conference Paper
Authors
Date Acquired
August 6, 2013
Publication Date
January 1, 1971
Publication Information
Publication: The Entry Plasma Sheath and Its Effects on Space Vehicle Electromagnetic Systems, Volume 1
Publisher: National Aeronautics and Space Administration
Volume: NASA-SP-252
Subject Category
Meeting Information
Meeting: Fourth Plasma Sheath Symposium
Location: Hampton, VA
Country: US
Start Date: October 13, 1970
End Date: October 15, 1970
Sponsors: National Aeronautics and Space Administration
Accession Number
71N21109
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.
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