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Published byImogen Andrews Modified over 9 years ago
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Satellites How do they work? NAVSTAR Global Positioning System Satellite
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Uses DirectTV, DBS News Telephones Cable GPS Emergency radio beacons
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Components ANY object that revolves around a planet (e.g. the moon) Artificial Orbit, Apogee, and Perigee Custom built “Space junk”
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Sputnik 1 (October 4, 1957) Soviet Union A Thermometer A Battery A Radio transmitter Pressurized Nitrogen gas
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3, 2, 1, Lift-off (Launch) Rockets and the space shuttle Orbital Velocity and Altitude Launch Window
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Types Weather satellites (TIROS, COSMOS) Communications satellites (Telstar, Intelsat) transponder Broadcast satellites Scientific satellites (Hubble telescope) Navigational satellites (GPS Navstar) Rescue satellites Earth observation satellites (LANDST) Military satellites (???)
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Components Frame/Body (Bus) Power source Computer Communications Attitude control system (ACS)
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Geostationary Orbits Positioned over the same area Normally, 22,223 Miles Weather Communication Communications Satellite
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Asynchronous Orbits Multiple passes 80-1,200 miles Teledesic, LEOs Observation (300- 600 miles) 3,000-6,000 miles Scientific 6,000-12,000 miles Navigation (GPS)
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Polar Orbit Low altitude Passes over the poles on each orbit Mapping and photography
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Teledesic: Low Earth Orbit Satellites (LEOs) Network of Constellations “Internet-in- the-Sky TM”
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LEO Coverage 288 operational satellites, divided into 12 planes with 24 satellites each
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LEO Service Optical Intense coverage Inter-Satellite Links
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Next Generation (Northpoint) Northpoint Technology Terrestrial satellite
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Northpoint Current: Multiple towers Northpoint “cellular network”
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Northpoint Impact Competition with cable and DBS Fiber optics to all Opportunities for Geostationary satellites Spectrum planning
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Broadwave USA Inc. Local service Local and National Programming Cheaper
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