NOAA Twin Otter Aircraft (IMAGE) NOAA Headquarters Caption NOAA scientists used a lidar aboard this Twin Otter aircraft to study the movement of ozone from the stratosphere to the lower atmosphere above California in 2010. Credit NOAA 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.