• Overview
  • Solar Maximum Mission Spacecraft
  • SMM Spacecraft
  • Upper Atmosphere Research Satellie
• Fact Sheet
• Timeline
• Science Goals & Objectives
  • Total Irradiance Measurements
  • Solar Cycles 21 & 22
  • Sun Spot Chart
• Instrument Heritage
  • ACRIM I Sensor Module
  • ACRIM II Sensor Module
  • ACRIM II Instrument
  • ACR II Instrument
  • ACR Instrument
  • ACR and ACRIM II
• Previous Misssions

• Overview - Less Technical
• Overview - More Technical
• History
  • Active Cavity Radiometer Type V
  • Long-Term Downward Trend in Total Solar Irradiance
  • Development of ACR
• Uses of Solar Irradiance Data
• Publications
• References

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