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Method and system for delivering virtual reference station data

  • US 7,480,511 B2
  • Filed: 09/19/2003
  • Issued: 01/20/2009
  • Est. Priority Date: 09/19/2003
  • Status: Expired due to Term
First Claim
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1. A method for delivering Virtual Reference Station (VRS) data derived by a VRS network processor at a VRS control station for a designated location to a mobile position determination unit with a terrestrial communications link, said method comprising:

  • creating a data message comprising pseudorange data derived for said designated location and pseudorange corrections for a designated region surrounding said designated location;

    sending said data message via a cellular telephone connection from said VRS control station to a moveable Real Time Kinematics (RTK) base station located in the designated region surrounding said designated location; and

    transmitting said data message from said moveable RTK base station to a mobile position determination unit using a radio transmitter independent of said cellular telephone connection, wherein said moveable RTK base station may be moved about within said designated region while performing said transmitting.

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