The satellite can be jolted about by the violent shaking that takes place during launch. Even if light, if the satellite is not designed to resist these jolts there is a danger that screws can become unloose or that metal fatigue can result in small fractures. To be on the safe side, tests are being carried out with vibrations that are both stronger and longer in duration that those experienced during launch.
In order to test to see whether the telescope can withstand the vibrations during launch, members of JAXA/ISAS, Nagoya University and Ehime University are carrying out telescope vibration tests. The tests this time will subject the telescope to a ‘gravity’ as strong as 20G’s! The large pipe-like object in the picture is the telescope. All so that the telescope does not break!