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Solrad 9
Solrad 9
Solrad 9
NamesExplorer 37
Mission typeSolar physics[1]
COSPAR ID1968-017A[1]
Spacecraft properties
SpacecraftSolrad 9
Dry mass198.0 kg[1] XXX CHECK THIS!!! XXX
Start of mission
Launch date18:29:00, March 5, 1968 (1968-03-05T18:29:00)[2]
RocketScout[1]
Launch siteWallops Island, United States[1]
End of mission
DisposalDeactivated[1]
Decay dateNovember 16, 1990[2]
Orbital parameters
Reference systemGeocentric
Eccentricity0.013716[2]
Perigee altitude448.0 kilometres (278.4 mi)[2]
Apogee altitude638.0 kilometres (396.4 mi)[2]
Inclination59.40°[2]
Period95.5 min[2]
Epoch1968[2]
Instruments
X-ray and UV detectors[3]

Solrad 9, also known as Explorer 37, was a satellite launched as part of the Solrad and Explorer programs.

Launch and orbit

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Science objectives

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Mission

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Solrad 9 exhausted the gas supply for its attitude control system on February 25, 1974. The lack of attitude control made the satellite useless for science, so it was switched off.[1]

References

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  1. ^ a b c d e f g Grayzeck, Ed (26 August 2014). "SOLRAD 9". NASA. Retrieved 31 December 2015.
  2. ^ a b c d e f g h Grayzeck, Ed (26 August 2014). "SOLRAD 9". NASA. Retrieved 31 December 2015.
  3. ^ Grayzeck, Ed (26 August 2014). "Solar Radiation Detectors". NASA. Retrieved 31 December 2015.