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Ground based navigation aid equipment for aircraft safety

  • US 10,147,328 B2
  • Filed: 10/20/2016
  • Issued: 12/04/2018
  • Est. Priority Date: 10/22/2015
  • Status: Active Grant
First Claim
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1. A method of performing a hazard analysis of navigation aid equipment using an external safety monitor, the method comprising:

  • monitoring performance of the navigation aid equipment by interrogating the navigation aid equipment with a first sequence of signal pulses;

    receiving, from the navigation aid equipment, a reply including a second sequence of signal pulses;

    determining if the performance includes any improper performance of the navigation aid equipment by determining whether any time delay in the second sequence of pulses received from the navigation aid equipment is outside of a tolerance range; and

    removing a signal from an antenna of the navigation aid equipment when any improper performance of the navigation aid equipment is determined.

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