Eric Madaras, NASA (IMAGE) NASA/Johnson Space Center Caption Eric Madaras, an aerospace technologist at NASA's Langley Research Center in Virginia, holds one of the Distributed Impact Detection System units used as part of the Ultrasonic Background Noise Test investigation aboard the International Space Station. Credit NASA/Sean Smith Usage Restrictions with nasa credit 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.