Sage III (IMAGE) NASA/Goddard Space Flight Center Caption NASA engineer Chip Holloway waits for the sun to align with the Stratospheric Aerosol and Gas Experiment (SAGE) III instrument during a clean room "sun-look" test on March 4, 2013, at NASA's Langley Research Center in Hampton, Virginia. SAGE III will measure aerosols, ozone, water vapor and other gases to help scientists better understand levels of ozone in the Earth's atmosphere. Credit NASA Langley/Sean Smith Usage Restrictions None License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.