SAGE III (image) NASA/Johnson Space Center Share Print E-Mail Caption The SAGE III instrument integrated on the EXPRESS Pallet Adapter (ExPA) after its final sharp edge inspection before its launch on Space X 10. This investigation will measure the stratospheric ozone, aerosols, and other trace gases by locking onto the sun or moon and scanning a thin profile of the atmosphere. Credit NASA Usage Restrictions None Share Print E-Mail 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.