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Satellite radiodetermination

  • US 6,040,798 A
  • Filed: 10/15/1996
  • Issued: 03/21/2000
  • Est. Priority Date: 10/24/1995
  • Status: Expired due to Term
First Claim
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1. Satellite radiodetermination apparatus, comprising:

  • a radio receiver for receiving a multiple frequency ranging signal from a first satellite and a further ranging signal from a second satellite, the radio receiver including;

    deriving means for deriving first ionospheric delay data from said multiple frequency ranging signal; and

    estimating means for estimating second ionospheric delay data for the further ranging signal on the basis of said first ionospheric delay data.

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