Anotherthing,
Dig out the email and PM it to me, you possibly were advised of the wrong person to send it to. We like new ideas!
nnc0,
The problem with the Airbus QNH has been know for some time in the Mode S world. However, QNH setting is not one of the DAPS that has been mandated in Europe for Enhanced Surveillance, hence for now none of the NATS systems take any notice of it. In hindsight, it should have been included in the Enhanced Surveillance requirements as it could be used for potential tools to prevent level busts to indicate that the pilot is flying with the wrong QNH setting.....hindsight's great!
The Selected Altitude DAP that is displayed to controllers is in effect just a number and is unaffected by any QNH settings, so the fact that Airbus have cocked up their implementation has no impact on current ops.
RS