SCaN Testbed (IMAGE) NASA/Johnson Space Center Caption The SCaN Testbed, operating aboard the International Space Station, features two S-band and one Ka-band software defined radios, which will help NASA demonstrate advanced communications, networking and navigation tools in space. 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.