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SpaceRef - Exploration and Missions - Human Missions - International Space Station - Propulsion
ISS Propulsion Systems - Atmospheric drag pulls the ISS toward Earth. Solar flux-sunlight and other solar phenomena-add to the problem. Reboosts will keep the Station orbiting at 217 to 285 miles, the altitudes required for the proper operation of everything from labs and living quarters to logistics and launch vehicles. Boeing Space Systems.
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