SME
Solar Mesosphere Explorer
Investigated ozone in the mesosphere
The SME was an Earth-orbiting spacecraft designed to investigate the processes that create and destroy the ozone in the mesosphere, the most upper layer of Earth’s atmosphere. SME launched on October 1st, 1981 and returned data until April 4, 1989. Nearly a year later, SME reentered Earth’s atmosphere.
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Launch Date: October 6, 1981
Decommission Date: April 4, 1989
Mission duration: 7 1/2 years
Lead Institution: LASP
Lead Funding Agency: NASA
Partners: NASA’s Jet Propulsion Laboratory (JPL), Ball Aerospace & Technologies Corp.
The primary science objectives were to determine what changes occur in the ozone distribution in the mesosphere as a result of changes in incoming solar radiation and to measure all changes in ozone density distribution in the altitude range 30 to 80 km and determine the causes of these changes.
SME measured the:
- Solar flux
- Ozone
- Temperature
- Water vapor
- Nitrogen dioxide
- Pressure
- Near-infrared airglow
SME had five instruments:
UV Ozone Instrument, 1.27μ Airglow Instrument, Four-channel Infrared Radiometer, Solar UV spectrometer
LASP student and professional mission operation team provided the commanding, downlink, data capture and data processing for the SME mission. This was the first time an educational institution controlled a spacecraft.