RapidScat Radar Technology (IMAGE) NASA/Johnson Space Center Caption RapidScat's radar technology used microwaves, bounced off the ocean's surface, to determine wind speed and direction. Credit NASA 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.