NASA Logo

NTRS

NTRS - NASA Technical Reports Server

Back to Results
Extreme ultraviolet dayglow observations with a helium gas absorption cellDuring the Apollo-Soyuz Test Project, an extreme-ultraviolet photometer with a cyclically operated helium gas-absorption cell observed the daytime sky from an orbital altitude of 225 km. When the line of sight pointed more than 60 deg from the sun, the instrument detected 2 to 70 rayleighs of flux scattered from neutral geocoronal helium at wavelengths from 504 to 584 A. The instrument also detected other radiation in the band 500-700 A of similar spatial distribution to the helium flux, which was definitely not due to the He I 584-A spectral line and which has not been detected by previous experimenters in data from 400 km altitude. Possible sources of this radiation are discussed.
Document ID
19780068424
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Freeman, J.
(California Univ. Berkeley, CA, United States)
Paresce, F.
(California Univ. Berkeley, CA, United States)
Bowyer, S.
(California Univ. Berkeley, CA, United States)
Lampton, M.
(California, University Berkeley, Calif., United States)
Date Acquired
August 9, 2013
Publication Date
September 1, 1978
Publication Information
Publication: Geophysical Research Letters
Volume: 5
Subject Category
Geophysics
Accession Number
78A52333
Funding Number(s)
CONTRACT_GRANT: NAS9-13807
Distribution Limits
Public
Copyright
Other

Available Downloads

There are no available downloads for this record.
No Preview Available