Method of determining geographical location of mobile unit using single communication satellite by calculating two possible location regions of mobile unit based on intersection of first and second instantaneous distances

摘要

The method involves calculating two possible location regions of a mobile unit based on an intersection of first and second instantaneous distances. One of the two possible location regions may be identified as the location region including the location of the mobile unit by observing a movement of the mobile unit due to a rotation of Earth. Independent claims are included for: (a) an apparatus for determining the geographical location of a mobile unit (b) a terrestrial station within a satellite system (c) a method of determining a geographical location of a mobile unit with a single satellite (d) a processor coupled within a terrestrial station of a satellite communication system (e) a satellite communication system