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Mission or Study ID:   STS-118
Shuttle Program
Launch/Start Date:
Landing/End Date:
13 days
STS-118 Crew Patch

STS-118, International Space Station (ISS) Assembly Flight 13A.1, is the 22nd assembly flight to the station. The crew consisted of Commander Scott J. Kelly, Pilot Charles O. Hobaugh, and Mission Specialists Tracy Caldwell, Rick Mastracchio, Benjamin Alvin Drew, Barbara Morgan, and Canadian Space Agency Astronaut Dafydd (Dave) Williams.

During the mission, the crew delivered a third starboard truss segment for the station's backbone, installed a spare parts platform, and swapped out a failed gyroscope used to orient the station. It's was also the first flight of an educator astronaut, Mission Specialist Barbara R. Morgan. She was involved in an interactive educational inflight event with students gathered in Boise, Idaho to discuss her mission and the educational aspects of human spaceflight.

Several Detailed Supplementary Objectives (DSOs) and Supplemental Medical Objectives (SMOs) will also be flown during the STS-117 mission. DSOs and SMOs are space and life sciences investigations. Their purpose is to determine the extent of physiological deconditioning resulting from space flight, test countermeasures to those changes, and characterize the environment of the Space Shuttle and/or space station relative to crew health. Experiments being performed during this mission are:

  • Bioavailability and Performance Effects of Promethazine During Space Flight (DSO 490)
  • Monitoring Latent Virus Reactivation and Shedding in Astronauts (DSO 493)
  • Sleep-Wake Actigraphy and Light Exposure During Spaceflight (DSO 634)
  • Space Flight and Immune Function (DSO 498)
  • Space Flight Induced Reactivation of Epstein-Barr Virus (98-E129)
  • Test of Midodrine as a Countermeasure Against Postflight Orthostatic Hypotension (SMO 006)

Space Shuttle Endeavour returned to Kennedy Space Center in Florida on August 21st bringing STS-118 to an end. This flight was the orbiter's 20th mission and the 119th in the Shuttle program's history.

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