Tryggvason launched as a payload specialist aboard the space shuttle Discovery in 1997.
with the Canadian news magazine Maclean's."I decided to look at how fluids would behave in space. There are a lot experiments that have fluid as an element. I ended up developing this electromagnetic levitation platform [and] flew that on the Russian space station, flew that on my flight [and] was involved in designing another one that is up on the space station now.
An airline transport-rated pilot with more than 4,500 hours of flight experience, including 1,800 hours as a flight instructor, Tryggvason was active in aerobatic flight and completed a captaincy check in a jet trainer with the Canadian Air Force.
Tryggvason was serving a research officer at the Low Speed Aerodynamics Laboratory at the National Research Council of Canada when the council chose him alongside Roberta Bondar, Marc Garneau, Steve MacLean, Ken Money and Robert Thirsk as the members of its first astronaut corps. A year after he returned from space, Tryggvason joined"The Penguins," NASA's 18th class of astronaut candidates selected in 1998. The two years of basic training was to prepare Tryggvason for a possible flight as a mission specialist and initially he was assigned as a crew representative to SAIL, or the Shuttle Avionics Integration Laboratory, at NASA's Johnson Space Center in Houston, which was used to check out the flight software for each mission.
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