3 ms·

How does the FAA think this is going to work after 2020 when air traffic control will run off of ADS-B positional telemetry from aircraft. It seems a GPS shutdo

• mschuster91 10y ago
  > It seems a GPS shutdown like this would basically shut down IFR flying and airport terminal control since ATC has no other way of knowing the position of airplanes. I highly doubt that good old-fashioned radar will be shut down. It has to be, anyway, for all the planes either that don't have the equipment for IFR, and the pilots which are not certified for IFR, only for VFR.
  • lutorm 10y ago
    By 2020 any airplane that flies in controlled airspace is required to be equipped with ADS-B out. This applies to VFR as well as IFR flights. Of course, VFR flights can continue flying VFR if GPS shuts down, but IFR flights wouldn't have that option.
• neurotech1 10y ago
  Modern Inertial Reference Units [0] (IRU/IRS/INS) are fitted to most airliners and business jets, and are an alternative to GPS. IRU accuracy is less than GPS, and older units have issues with drift. The FAA hasn't approved any IRU for ADS-B[1] backup. More importantly, ATC can use the Mode-S[2] transponder without GPS to locate the aircraft. Secondary Surveillance Radar won't be phased out in 2020. ADS-B will be required by the FAA in 2020. [0] https://en.wikipedia.org/wiki/Inertial_navigation_system https://en.wikipedia.org/wiki/Inertial_navigation_system [1] https://en.wikipedia.org/wiki/Automatic_dependent_surveillance_%E2%80%93_broadcast https://en.wikipedia.org/wiki/Automatic_dependent_surveillan... [2] https://en.wikipedia.org/wiki/Secondary_surveillance_radar#Mode_S https://en.wikipedia.org/wiki/Secondary_surveillance_radar#M...
  • lutorm 10y ago
    I was under the impression that the explicit aim of the ADS-B directive is to phase out SSR, which would would save a massive amount of money.
• swingbridge 10y ago
  Traditional transponders aren't going away and they would still work with secondary radar.