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Apparatus and method for determining velocity of a platform

  • US 5,787,384 A
  • Filed: 11/22/1995
  • Issued: 07/28/1998
  • Est. Priority Date: 11/22/1995
  • Status: Expired due to Term
First Claim
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1. An apparatus for generating a velocity signal indicative of the velocity of a platform using a satellite-based navigation system comprising:

  • a GPS receiver located at the platform for receiving a plurality of GPS signals from a corresponding plurality of GPS satellites and outputting GPS navigation data;

    an inertial measurement unit located at the platform for outputting inertial navigation data indicative of the inertial movement of the platform;

    a processor for generating an acceleration signal indicative of the acceleration of the platform by combining a first acceleration measurement of the platform calculated from the GPS navigation data with a second acceleration measurement of the platform calculated from the inertial navigation data; and

    said processor further generating the velocity signal from the acceleration signal and the GPS navigation data.

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