Acquisition of LEO satellites without a compass

摘要

A method and apparatus for establishing a communication link between a user terminal and a first satellite associated with a first satellite service is disclosed. The user terminal determines a position of the user terminal based at least in part on location information provided by a satellite positioning system (SPS) receiver associated with the user terminal and is different from the first satellite service. Determining a reference azimuth angle of the user terminal based at least in part on the position of the second satellite associated with the satellite service of the first satellite, obtaining ephemeris data of the first satellite, The user terminal's directional antenna is aligned with the first satellite based at least in part on the reference azimuth and the received ephemeris data.