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Satellite navigation

  • US 6,188,958 B1
  • Filed: 01/24/2000
  • Issued: 02/13/2001
  • Est. Priority Date: 07/19/1997
  • Status: Expired due to Term
First Claim
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1. Satellite navigation method, for a navigating object, the position of which is determined from a received signal of a plurality of satellites (satellite navigation),the method comprising the steps of:

  • evaluating at a reference station, which comprises a known antenna position, a differential correction data;

    calculating a differential correction for individual satellites from a comparison of a measured range value with a geometric range value calculated from the known antenna position, wherein the differential corrections are calculated at one of the navigating object by transmiting the differential correction data to the navigating object or, at the reference station from transmitted raw measured values within the navigating object;

    correcting the measured range value in the navigating object by the differential correction such that, for the reference station, related range values are evaluated from code-and carrier phase measurements, the differential corrections of a non-filtered code psuedo range and the differential corrections of an integrated phase Doppler shift are evaluated individually from a comparison of the measured range values with the geometrical range values calculated from the known position, for the navigating object the non-filtered code psuedo ranges and the integrated Doppler shifts evaluated from the carrier phases are corrected individually with related code-and phase differential corrections, and after this correction the individual differential corrected measured values of the navigating object are combined to “

    carrier-smoothed codes”

    .

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