CSA; Alternate Payload Specialist to MacLean for STS-52 Mission LAGEOS-2 and Test of the Canadian Space Vision System.
In 1978, he was a guest research associate at Kyoto University, Japan, followed by a similar position at James Cook University in Townsville, Australia. In late 1979, he returned to the University of Western Ontario as a lecturer in applied mathematics.
In 1982, Mr. Tryggvason joined the Low Speed Aerodynamics Laboratory at the National Research Council (NRC). He became part of the NRC team assembled to study the sinking of the Ocean Ranger oil rig in support of the Royal Commission investigation into that tragedy. He designed and led the aerodynamics tests, which established the wind loads acting on the rig.
He was one of the six Canadian astronauts selected in December 1983. He was back-up Payload Specialist to Steve MacLean for the CANEX-2 set of experiments which flew on Mission STS-52, October 22 to November 1, 1992. He was the Project Engineer for the design of the SVS target spacecraft which was deployed during that mission.
He is the principal investigator in the development of the Large Motion Isolation Mount (LMIM) which has flown numerous times on NASA's KC-135 and DC-9 aircrafts. He is also the principal investigator in the development of the Microgravity vibration Isolation Mount (MIM). The MIM has been in operation on board the Russian Mir Space Station since April 1996 and was first operated by U.S. astronaut Shannon Lucid during her historic six month flight on the Mir. The MIM is being used on the Mir to support several Canadian and U.S. experiments in material science and fluid physics.
He was active in supervising undergraduate student projects at several universities across Canada. Between 1982 and 1992, he was a part-time lecturer at the University of Ottawa and Carleton University, teaching graduate courses on structural dynamics and random vibrations.
He also served as a Canadian Space Agency representative on the NASA Microgravity Measurement Working Group, and the International Space Station (ISS) Microgravity AIT (Analysis and Integration Team).
Planned shuttle mission. Cancelled after Challenger disaster.
Deployed and retrieved the CRISTA-SPAS-2 (the Cryogenic Infrared Spectrometers and Telescopes for the Atmosphere-Shuttle Pallet Satellite-2) designed to study Earth's middle atmosphere. The CRISTA-SPAS-2 was making its second flight on the Space Shuttle and represented the fourth mission in a cooperative venture between the German Space Agency (DARA) and NASA.
CRISTA-SPAS was deployed by the RMS arm at 22:27 GMT on August 7 and was recaptured by Discovery's RMS arm at 15:14 GMT on August 16. Because of unfavorable weather conditions at the primary shuttle landing site at the Kennedy Space Center, Discovery was waved off for its scheduled August 18 landing. STS-85 landed the next day, at Kennedy Space Center at 11:08 GMT.