×

Ionospheric error prediction and correction in satellite positioning systems

  • US 7,741,994 B2
  • Filed: 02/13/2003
  • Issued: 06/22/2010
  • Est. Priority Date: 02/13/2002
  • Status: Expired due to Term
First Claim
Patent Images

1. A method for correcting ionospheric errors in a satellite positioning system (“

  • SPS”

    ) having a SPS server with known positional coordinates and a mobile SPS receiver, the method comprising;

    receiving SPS signals from SPS satellites at the SPS server;

    calculating a position of the SPS server using the SPS signals from the SPS satellites;

    comparing calculated positional coordinates of the calculated position of the SPS server with the known positional coordinates;

    determining ionospheric errors in response to comparing the calculated positional coordinates of the calculated position of the SPS server with the known positional coordinates;

    creating an ionospheric model of predicted ionospheric errors from the determined ionospheric errors, the ionospheric model having ionospheric model parameters; and

    transmitting the ionospheric model parameters to the mobile SPS receiver, where the mobile SPS receiver uses the ionospheric model parameters to create an SPS receiver ionospheric model.

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