… moment of push-back to wheels-up, including surveillance data in flight, touchdown time, and gate assignment.” Common Flight Data Structures Flight data need to be shared throughout the NAS. … Weather, ATM, Performance, General NAS Data clearances current capacities current weather gate asignments schedules flight plans preferences a/c resources local weather traffic forecasts … estimates en route weather congestion areas en route spacing local weather taxiway and gate status delay information a/c type, speed and position updated arrival times intended routes …