In article hGlue.2105$HU.168@trnddc03, Tailwind
wrote:

And the shutting down of some Mode S sites has to do with replacement by
the new ASR-11 radar. It's a digital monopulse radar from Raytheon, but
not equipped with Mode S. These radars are required for the new STARS
automation (controller display) system going into some TRACONs.

one correction: STARS does not require an ASR-11.

--
Bob Noel
no one likes an educated mule