March 2002, space shuttle Columbia STS-109 commander Scott Altman photographed in the orbiter cockpit during the 4th HST - Hubble Space Telescope servicing mission. Note astronaut Altman was wearing his personal Rolex GMT-master Rootbeer pilotwatch next to the NASA ActiWatch. The latter was a waterproof, non-intrusive sleep-wake monitor which contained an accelerometer and photodiode in order to record the activity of the crewmembers, and the ambient light they experienced. (Photo: NASA)













