That's so Raven (IMAGE) NASA/Johnson Space Center Caption Affixed to an external platform on the International Space Station, the Raven demonstration will autonomously track visiting vehicles, testing a real-time relative navigation system. Credit NASA Usage Restrictions NASA 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.