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Enhanced database information for urban navigation

  • US 8,271,189 B2
  • Filed: 06/23/2009
  • Issued: 09/18/2012
  • Est. Priority Date: 09/26/2008
  • Status: Active Grant
First Claim
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1. A method for use in at least one electronic device, the method comprising:

  • with said at least one electronic device;

    accessing a satellite signal visibility mask for at least one satellite enabled to transmit an RF signal;

    establishing an enhanced database for at least a plurality of point locations based, at least in part, on said satellite signal visibility mask;

    providing at least a portion of said enhanced database to at least one mobile device; and

    wherein said signal visibility mask for each of said plurality of point locations comprises a mask function to establish an expected azimuth/elevation mask for at least one of a potential line-of-sight (LOS) signal reception, and/or a potential non-line-of-sight (NLOS) signal reception.

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