Akihiko Hoshide, JAXA (IMAGE) NASA/Johnson Space Center Caption JAXA astronaut Akihiko Hoshide performs maintenance work on the International Space Station during an Expedition 32 spacewalk. Antennas in the background include those being used for the SCaN Testbed's testing of software defined radios in S-band and Ka-band. 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.