Newps writes:



Owen wrote:
The FAA's strategy changed in September, 2001.

Primary
coverage will be with us to stay, and may even be expanded in some areas.


Radar's days are limited. After ADS-B gets rolled out radar sites will
be decommissioned.


I doubt that. I've no doubt they'll be downgraded, but as much as the FAA
would love to unplug them, other folks will object.

That said, while the primary radar exists; I hear it's less and less well
maintained. Hopefully it can still spot invading Zeppelins but lesser
targets...?

[Pre WWII, the Germans flew the Graf Zeppelin airship around looking
to see if the British had radar. Trouble was, they were not listening
anywhere near the ~30 Mhz freq. used by the Brit's system.. Needless to
say, to Chain Home it must have looked like a parachute flare in a pitch
black darkroom...]

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