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Instrument alignment devices and methods

  • US 20030206139A1
  • Filed: 05/16/2003
  • Published: 11/06/2003
  • Est. Priority Date: 05/21/2001
  • Status: Active Grant
First Claim
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1. An apparatus for determining an instrument boresight azimuth heading, comprising:

  • a gyro having a first input and a first output;

    a rocking angle generator having a second output, wherein the second output is communicatively coupled to the first input of the gyro, producing a demodulated signal at the first output;

    a signal multiplier communicatively coupled to the second output and the demodulated signal for multiplying the second output and the demodulated signal and producing a multiplied signal; and

    a filter communicatively coupled to the multiplied signal for producing a filtered output.

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