Steven Powell, Cornell University (IMAGE) Cornell University Caption Steven Powell, research engineer in the department of electrical and computer engineering at Cornell University, is pictured with the Cornell GPS antenna array in a clean room at the NASA/Johnson Space Center in Houston, Texas. The array is currently mounted on the truss structure of the International Space Station. Credit NASA Johnson Spaceflight Center 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.