The Stratospheric Aerosol and Gas Experiment I (SAGE)
was carried aboard the Applications Explorer Mission-2 (AEM-2) spacecraft. SAGE I data collection began February 21, 1979. Four months after launch, a spacecraft power subsystem problem forced data collection to be limited thereafter to sunsets only. Limited operation continued until November 18, 1981, when the spacecraft power system forced termination of the experiment.
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