×

Telemetry, tracking and control for satellite cellular communication systems

  • US 5,187,805 A
  • Filed: 10/02/1989
  • Issued: 02/16/1993
  • Est. Priority Date: 10/02/1989
  • Status: Expired due to Term
First Claim
Patent Images

1. A control system for a satellite communication system having at least one satellite with transmitters and receivers providing a plurality of user communication channels for establishing communication among a plurality of users, the control system comprising:

  • satellite control subsystem means on board the satellite for controlling the functions of the satellite;

    ground station control means;

    first means for coupling said ground station control means to one of the user communication channels for establishing communication with said satellite control subsystem, said ground station control means thereby utilizing said one of the user communication channels for transmitting commands to said satellite control subsystem means;

    said satellite including;

    a plurality of transmitter and receiver means for projecting a plurality of adjacent moving cells onto the earth;

    each of said cells including means for transmitting and receiving said one of the user communication channels; and

    hand-off means for switching said ground station control means between each of said moving cells so that said commands can continuously be provided to the satellite at least during a predetermined time period when the satellite is in the line of sight of said ground station control means; and

    said satellite control subsystem means being responsive to said commands from said ground station control means to enable said commands to control a selected function of the satellite.

View all claims
  • 2 Assignments
Timeline View
Assignment View
    ×
    ×