"THE DOPPLER GCA."
By Marv Howell, Colonel, USAF(RET)
Col. Bill Smith was a great lead Navigator (1969-70) in the 361st
TEWS. I was working in Stan Board not long after I got there because he
recognized the need for continuity and they had been adding new Stan
Board Navs based on longevity up to that time. He was very innovative
and it was a pleasure to work for him. Col. Smith created the "Doppler
GCA" after we lost a bird into a mountainside because of a
thunderstorm and perhaps a GCA problem.
Col. Smith had me layout an approach grid for Phu Cat which allowed
us to monitor our position on the chart during some of those hairy
weather letdowns. We took a new Doppler set before we started home and
then closely monitored the aircraft position on the grid during the
let-down and approach. He and I both tested it in clear weather and then
it became a standard for the Squadron. We didn't make any attempt to
"steer" the bird as you would with GCA. We just developed the
procedures so the Nav could monitor the approach and give an early
warning for any hazardous position.
I don't know of any case where that system saved any airplanes,
but it did become a good backup for the GCA and also to backup the
usually unreliable weather radar. Colonel Smith's photo is in the 361st
year book provided by Dave Brooks. Dave and I shared a trailer at Prong
City and just last Tuesday got together for a couple of hours to swap
war stories. Hope to make the next reunion
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