![]() This value, like maximum height, also is measured in degrees from the horizon. If you hold your fist at arm's length and place your fist resting on the horizon, the top will be about 10 degrees.Īppears is the location in the sky where the station will be visible first. The horizon is at zero degrees, and directly overhead is ninety degrees. It represents the height of the space station from the horizon in the night sky. Max Height is measured in degrees (also known as elevation). Visible is the maximum time period the space station is visible before crossing back below the horizon. This is the optimum viewing period as the sun reflects off the space station and contrasts against the darker sky. All sightings will occur within a few hours before or after sunrise or sunset. Time is when the sighting opportunity will begin in your local time zone. What does all this sighting information mean? pressure or temperature measurements, valve positions, etc.).The following ISS sightings are possible from Wednesday through Thursday Date segment alone, more than 1.5 million lines of flight software code run on 44 computers communicating via 100 data networks transferring 400,000 signals (e.g. In the International Space Station’s U.S.More than 3 million lines of software code on the ground support more than 1.5 million lines of flight software code.More than 50 computers control the systems on the space station. ![]()
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