ASPM AERO: Definitions of Variables

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The following are definitions for the fields in ASPM AERO reports:

  • AAR (Airport Arrival Rate). The facility determined arrival rate that it can handle given the current weather conditions, traffic mix, and runway configuration. Facilities update the arrival rate when conditions change. When the AAR is reduced due to traffic management initiatives, it is referred to as the Efficiency AAR. When no traffic management initiatives are in effect it is referred to as the Capacity AAR.
  • ADR (Airport Departure Rate). The number of departures an airport can support, per unit of time.
  • Airborne Holding Events. The number of aircraft that experience delay due to airborne holding and the total minutes of airborne delay en route to the specified destination airport. Airborne delays are reported for all aircraft which incur 15 minutes or more of cumulative airborne delay throughout the route of flight.
  • Airborne Holding Minutes. The minutes of delay due to airborne holding and the total minutes of airborne delay en route to the specified destination airport. Airborne delays are reported for all aircraft which incur 15 minutes or more of cumulative airborne delay throughout the route of flight.
  • Arrival Cancellations. The number of cancelled Arrivals for scheduled flights. Determined next day using flight plan cancellation messages and scheduled flights not flown. ASQP cancellations are used when available.
  • Average Taxi Out. The average difference between Wheels Off Time and Gate Out Time for departing flights.
  • Completion Rate. The percentage of scheduled arrivals that were not cancelled. Calculated as 100* (1- Cancelled Arrivals) divided by the number of Scheduled Flights. Cancelled Arrivals are determined next day using flight plan cancellation messages and scheduled flights not flown. ASQP cancellation data are used when available.
  • Departure Cancellations. The number of cancelled Departures for scheduled flights. Determined next day using flight plan cancellation messages and scheduled flights not flown. ASQP cancellations are used when available.
  • Diversions. The number of flights that were diverted en route from their originally scheduled destination to an alternative airport.
  • Equipment . Number of hours with infrastructure outages by equipment category.
  • Go Arounds. An aborted landing of an aircraft on final approach. The reported numbers do NOT include Military, HELO, “Touch and Go”, unknown, or untagged operations.
  • ISAN. Infrastructure Service as Needed. The ISAN is an indicator of infrastructure services required for air traffic control and pilot navigation. Values of 1 or higher are counts of equipment or services required for arrivals or departures that were unavailable at that time.
  • OPSNET Delays. Delays to Instrument Flight Rules (IFR) traffic of 15 minutes or more, which result from the ATC system detaining an aircraft at the gate, short of the runway, on the runway, on a taxiway, or in a holding configuration anywhere en route.
  • OPSNET Local Departure Delays. The sum of Departure Delays (non-TMI) attributed to conditions at the departure airport, and to TMIs implemented by a TRACON or ARTCC due to a local constraint.
  • OPSNET Operations. All IFR and VFR itinerant and local arrivals and departures.
  • OPSNET Total Operations. IFR itinerants and VFR itinerant operations (arrivals and departures), and local operations at the airport as reported by Air Traffic Control Towers (ATCTs). Excludes overflights.
  • TAER. The Terminal Area Efficiency Rate (TAER) icon represnts the average excess times for flight arrivals crossing from 100 to 40 miles of the airport and 40 miles to Wheels On. The number displayed below the icon is the TAER value for reportable hours.
  • Taxi In. The sum of the Taxi In Time (Gate In minus Wheels On) for all arrivals divided by the number of arrivals, in minutes.
  • Taxi Out The sum of the Taxi Out Time (Wheels Off minus Gate Out) for all departures divided by the number of departures, in minutes. Color coding represnets the Taxi Out Times compared to the 3-year seasonal average.
  • Weather Impact. Weather severity classified as None, Mild, Moderate, or Severe. Color coding represents severity of weather impact (none, minor, moderate, or severe). Factors considered are ceiling, visibility, wind speed, airport weather (such as snow, sleet), and local and en route thunderstorms. Also see Weather Factors