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Lyman-Alpha and UV Airglow Study

NSSDCA ID: 1967-073A-13

Mission Name: OGO 4
Principal Investigator:Dr. Phillip W. Mange

Description

This experiment was designed to measure the Lyman-alpha nightglow radiation from earth (1050 to 1350 A), the Lyman-alpha background radiation from space (1050 to 1350 A), and the far UV airglow radiation from earth (1230 to 1350 A and 1350 to 1550 A) using eight detectors. Seven of the detectors were pointed toward the earth to measure the far UV airglow and Lyman-alpha nightglow, and one was directed toward space to measure the Lyman-alpha background radiation. The 1050- to 1350-A detectors had lithium fluoride windows and nitric oxide gas filler, the 1230- to 1350-A detectors had calcium fluoride windows and nitric oxide gas filler, and the 1350- to 1550-A detectors had barium fluoride windows and unsymmetrical dimethyl hydrazine gas filler. These detectors observed zenith and nadir intensities in the night sky at altitudes of 400 to 900 km. The output consisted of intensities taken at 2-min intervals covering the period July 29, 1967, to January 20, 1969. The satellite tape recorder failed on January 20, 1969, limiting the data to real time only. Prior to this equipment failure, the radiation detectors operated with negligible loss of sensitivity with the exception of the 1230- to 1350-A detectors which, for no known reason, steadily decreased in sensitivity and became useless after 6 weeks of operation. In general, the operation of the instrumentation was nominal.

Alternate Names

  • OGO4/Lyman-AlphaandUVAirglowStudy

Funding Agency

  • NASA-Office of Space Science Applications (United States)

Disciplines

  • Space Physics: Ionospheric Studies
  • Space Physics: Thermospheric Studies

Additional Information

Questions and comments about this experiment can be directed to: Coordinated Request and User Support Office

 

Personnel

NameRoleOriginal AffiliationE-mail
Dr. Robert R. MeierOther InvestigatorUS Naval Research Laboratoryrobert.meier@nrl.navy.mil
Dr. Phillip W. MangePrincipal InvestigatorUS Naval Research Laboratory
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