A satellite system facilitates communications between earth stations and both geostationary satellites and non-geostationary satellites in an orbit at a lower altitude than that of said the geostationary satellites by preventing the non-geostationary satellite from transmitting signals that might possibly...http://www.google.com/patents/US5444449?utm_source=gb-gplus-sharePatent US5444449 - System and method for reducing interference between satellites
