×

Reference Satellite

  • US 20130002480A1
  • Filed: 01/05/2012
  • Published: 01/03/2013
  • Est. Priority Date: 01/05/2011
  • Status: Abandoned Application
First Claim
Patent Images

1. An apparatus for determining the location of a receiver in dependence on signalling events transmitted to the receiver by a satellite constellation comprising a reference satellite and one or more other satellites, the apparatus being arranged to:

  • for each of the one or more other satellites, compare an indication of the transit time of a signalling event transmitted by that satellite and an indication of the transit time of a signalling event transmitted by the reference satellite; and

    calculate the location of the receiver in dependence on those comparisons;

    the apparatus being further arranged to determine, for each of the satellites in the constellation, an indication of an error that would be incorporated in the comparisons if that satellite were selected as the reference satellite and to designate one of the satellites in the constellation as the reference satellite in dependence on those indications.

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