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Mission or Study ID:   STS-28
Shuttle Program
Launch/Start Date:
Landing/End Date:
5 days
STS-28 Crew Patch

STS-28 was the fourth classified mission dedicated to the Department of Defense with a crew consisting of all military personnel: Commander Brewster H. Shaw, Jr., Pilot Richard N. Richards, and Mission Specialists James C. Adamson, David C. Leestma, and Mark N. Brown. The Space Shuttle Columbia, the first operational reusable spaceship in NASA's fleet, lifted off from Kennedy Space Center the morning of August 8, 1989. This was the thirtieth flight of the Space Shuttle, and the first flight of the refurbished Columbia since the 61-C mission in 1986.

The primary payload on this flight was classified.

Non-classified life sciences experiments performed during the STS-28 mission were those classified as Detailed Supplementary Objectives (DSOs). A DSO is a NASA-sponsored investigation performed by Space Shuttle crewmembers, who serve as the test subjects. These studies are designed to require minimal crew time, power and stowage. Biomedical DSOs focus on operational concerns, including space motion sickness, cardiovascular deconditioning, muscle loss, changes in coordination and balance strategies, radiation exposure, pharmacokinetics and changes in the body's biochemistry.

During the flight, the crew shut down a thruster in the reaction control system (RCS) because of indications of a leak. Also, a RCS heater malfunctioned.

The Shuttle Atlantis landed at Edwards Air Force Base on August 13, 1989.

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