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Marc

<<fly two legs in opposite directions...>>

You didn't read my post carefully. I said to fly two legs in opposite directions. The only way I know of to get an accurate TAS, then to solve for correct IAS, which will solve for static port position error. The "ZOOM" test over a runway at 50' altitude will confirm this.
(you must land and set your altimeter to airport elevation, of course)
Regards,
Tony Durizzi

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