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    Re: Is Celestial Navigation really a backup to GPS Navigation?
    From: Gary LaPook
    Date: 2018 Sep 18, 03:24 -0700

    But what about WAAS as used by aircraft making precision instrument approaches down to 200 feet above the ground, in the clouds, to a runway only 200 feet wide? SA reduced the accuracy to 100 meters, 95% of the time with larger errors the remaining 5% of the time. And spot jamming or spoofing with low power equipment placed need the airport by hostile power or terrorists? (Of course CN wouldn't be of any use in these situations. )

    Gl

       
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