G.E. Perry (1999), JBIS, 52, 348-349Refcode
The 1993 proposal for the Zerkalo geostationary communications satellite has developed into a system of twin, coplaner satellites, with a 12-hour phase difference, in an eccentric, 24-hour orbit. A 63° inclination “tundra” orbit would provide continuous personal and mobile communications to polar regions through a 15 m diameter antenna.
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