Satellites, Balloons and other Air-Borne Transmitters

See Spectrum, March 1998, p. 28.

orbit	example	number of satellites	distance to earth	round-trip time, ms
geostationary	Galaxy		22,000 mi	260
LEO	Teledesic	250	850 mi
LEO	Iridium	66	780 km	10 ms, 160 ms total typical

VSAT foot prints
No Cable? No D.S.L.? Try Satellite, NYTimes, Nov. 23, 2000.
Satellite access
Angel Technologies: tag team of manned HALO (High Altitude, Long Operation) planes as orbiting communications platforms
Planes at 52,000 ft
tart-Ups Pin Hopes on an Internet Route Through the Sky (NYT, 11/30/1998)

Last updated by Henning Schulzrinne