Crew PADLES is "an experiment to measure and quantify personal radiation exposure" of the Japanese astronaut's who stay aboard the ISS.
Crew PADLES dosimeter is a passive radiation dosimeter which Japanese astronauts can always carry during stay aboard the ISS for their space radiation exposure management. Crew PADLES dosimeter is contained in a small polycarbonate case, whose frame has a strap hole to tie a JAXA strap, so that an astronaut can hang the dosimeter at his/her side even when he/she is performing daily tasks aboard the ISS.
Duration and accumulated duration of stay in space can be determined by comparing astronaut's radiation dose that is measured in-flight by a radiation dosimeter against a threshold dose level set for astronaut health protection (Total Effective Dose Equivalent (TEDE) dose limit).
Japanese astronauts always carry Crew PADLES dosimeter through there flight period from pre-launch to landing.
Up to now, the following astronauts brought Crew PADLES dosimeters to the Space Shuttle/ISS with them and used the dosimeters for radiation dose measurement during their in-flight operations onboard the Space Shuttle/ISS. Those Crew PADLES dosimeters were brought back to the ground with the astronauts and processed for data analysis at JAXA Tsukuba Space Center.
The following two foreign astronauts have used Crew PADLES dosimeters during their flight to the ISS for their in-flight radiation dose measurements. These were conducted as collaborative activities intended for verifying operability of the Crew PADLES, for collecting more data and for international cooperation.
Born in 1972 in Kuala Lumpur, Malaysia, Doctor of Medicine.
He was selected as the first Malaysian astronaut in 2006.
He is the first Muslim who spent Ramadan (fasting month) in space.
Flight History : October 10 to 21, 2007 (Launched on Soyuz TMA-11(15S), and returned on Soyuz TMA-10(14S))
Born in 1978 in Gwangju, Korea, Doctor of Biological Engineering.
She was selected as the first Korean astronaut in 2006.
Flight History : April 8 to 19, 2008 (Launched on Soyuz TMA-12(16S), and returned on Soyuz TMA-11(15S))