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

Internet Technical Notes and Resources
Last updated by Henning Schulzrinne