Originally Posted by
ImSoSuss
The ATC playback I saw showed the Blackhawk rising from 200' to 350' and also showed the CRJ decending and meeting the Blackhawk at 350'. So what was showing wrong?
I'm assuming you didn't see a phone video of the controller's actual scope?
What kind of data was it? ADS-B? I'm pretty darn sure that's GPS derived "altitude" not barometric. So independent from mode C and altimeter. That might actually check with the static system calibration hypothesis.
Don't know if the controller was referencing ADS-B or mode C. How do they deal with conflicting data there?