Please make a donation to support Gunter's Space Page.
Thank you very much for visiting Gunter's Space Page. I hope that this site is useful and informative for you.
If you appreciate the information provided on this site, please consider supporting my work by making a simple and secure donation via PayPal. Please help to run the website and keep everything free of charge. Thank you very much.

Explorer: SAGE (AEM 2)


The SAGE (Stratospheric Aerosol & Gas Experiment) spacecraft was the second of the Applications Explorer Missions (AEM). The small, versatile, low-cost spacecraft was made of two distinct parts:

  • the SAGE instrument module containing the detectors and the associated hardware, and
  • the base module containing the necessary data handling, power, communications, command, and attitude control subsystem to support the instrument mode.

The objective of the SAGE mission was to obtain stratospheric aerosol and ozone data on a global scale for a better understanding of the earth's environmental quality and radiation budget. The spacecraft was designed for a 1-year life in orbit. The spacecraft experienced power problems after 15 May 1979. Spacecraft operations continued until 19 November 1981. The signal from the spacecraft was last received on 7 January 1982, when the battery failed.

Later SAGE instruments were flown as instruments on other satellites: SAGE II on ERBS and SAGE III on Meteor-3M 1 (originally planned for EOS B).

Nation: USA
Type / Application: Research
Operator: NASA
Equipment: SAGE-I
Propulsion: ?
Power: 2 deployable solar arrays, batteries
Lifetime: 1 year
Mass: 149 kg
Orbit: 547 km × 659 km, 54.93
Satellite COSPAR Date LS Launch Vehicle Remarks
SAGE (AEM 2, Explorer 60) 1979-013A 18.02.1979 WI LA-3 Scout-D1


  • NSSDC Master Catalog: SAGE