Satellite Glossary
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leader
Non-magnetic strips of tape (either paper or plastic) at the beginning and end of film.
letterbox format
The ratio of width to height (the aspect ratio) needed to show widescreen movies at dimensions that fit a TV screen.
locked in
A videotape or other recorder that is moving at its regular speed and is ready to accept a feed.
locking up
The brief period when a videocassette wobbles as it starts to play before it stabilizes and runs smoothly.
Low Earth Orbit (LEO)
Satellites in low Earth orbit travel about 17,500 miles per hour, about a thousand kilometers above the Earth's surface. They can circle the Earth in about an hour and a half.