| definition
| - The Solar Mesosphere Explorer (SME) mission objective was primarily to
investigate the processes that create and destroy ozone in the Earth's
mesosphere and upper stratosphere. Some specific goals were (1) to
determine the nature and magnitude of changes in mesospheric ozone
densities resulting from changes in the solar ultraviolet flux; (2) to
determine the interrelationship between solar flux, ozone, and the
temperature of the upper stratosphere and mesosphere; (3) to determine
the interrelationship between ozone and water vapor; and (4) to
determine the interrelationship between nitrogen dioxide and
ozone. The satellite experiment complement consisted of a solar
ultraviolet spectrometer, an ultraviolet ozone spectrometer, an
infrared radiometer, a 1.27-micrometer spectrometer, and a nitrogen
dioxide spectrometer. In addition, a solar proton alarm detector was
carried on board to measure the integrated solar flux in the range 30
to 500 MeV. Spin stabilized at 5 rpm, the satellite moved in a 3
a.m. to 3 p.m. sun-synchronous orbit. The spacecraft body was a
cylinder approximately 1.7 by 1.25 m and consisted of two major
modules: the observatory module that housed the scientific
instruments, and the spacecraft bus. The spin axis was oriented normal
to the orbital plane. The command system was capable of executing
commands in real time or from stored program control. Power was
supplied by a solar cell array. The telemetry system was used either
in a real-time or in a tape-recorder mode. Further details and some
measurement results are written in C. A. Barth et al., 'Solar
mesosphere explorer: scientific objectives and results,'
Geophys. Res. Lett., v. 10, no. 4, p. 237, 1983. All instruments on
board the SME were turned off in December 1988 because of energy
considerations.
- Auxiliary Information -
Launch Date and Time : 1981-10-06 11:27:00
Epoch Date and Time : 1981-10-16
Apogee (km or AU): 551.
Perigee (km or AU): 535.
Inclination (degree) : 97.5
Orbit Type : Geocentric
IDN_Node: USA/NASA
Group: Platform_Details
Entry_ID: SME
Group: Platform_Identification
Platform_Category: Earth Observation Satellites
Short_Name: SME
Long_Name: Solar Mesospheric Explorer
End_Group
Group: Synonymous_Platform_Names
Short_Name: SME
End_Group
Group: Orbit
Orbit_Inclination: 97.5
Perigee: 535
Apogee: 551
End_Group
Creation_Date: 2007-11-28
Online_Resource: http://lasp.colorado.edu/sme/
Sample_Image: http://lasp.colorado.edu/sme/gifs/sme.gif
Group: Platform_Logistics
Launch_Date: 1981-09-06
Launch_Site: Cape Canaveral/Kennedy Space Center, USA
Primary_Sponsor: NASA
End_Group
End_Group (en)
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