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Training evaluation process

  • US 4,442,491 A
  • Filed: 06/23/1981
  • Issued: 04/10/1984
  • Est. Priority Date: 06/23/1981
  • Status: Expired due to Fees
First Claim
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1. A method of correcting data on an aircraft'"'"'s position relative to the earth, said data being obtained during flight with an inertial navigation system (INS) on board said aircraft, comprising the steps of:

  • prior to commencing an aircraft engagement, determining the pre-engagement position of said aircraft relative to the earth independently of said INS,at said pre-engagement position, operating said INS to obtain pre-engagement INS data on the position of said aircraft relative to the earth,recording said pre-engagement INS data on position obtained by said INS at said pre-engagement position,flying said aircraft in an engagement,during said engagement of said aircraft continuing to operate said INS to obtain INS data on the position of said aircraft relative to the earth,recording the INS data obtained on position during said engagement,after the termination of said engagement by said aircraft, determining the post-engagement position of sad aircraft relative to the earth independently of said INS,at said post-engagement position, operating said INS to obtain post-engagement INS data on the position of said aircraft relative to the earth,recording said post-engagement INS data on position obtained by said INS at said post-engagement position,comparing said independently determined pre-engagement position of said aircraft with the pre-engagement INS data on position to obtain pre-engagement error functions of position,comparing said independently determined post-engagement position of said aircraft with the post-engagement INS data on position to obtain post-engagement error functions of position.employing said pre-engagement error functions of position, said post-engagement error functions of position and the known time-variant drift characteristics of position of said INS to derive position correction functions during said engagement,employing said position correction functions to correct the recorded INS data obtained on position during said engagement to obtain corrected INS data on position during said engagement, andstoring said corrected INS data on position.

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