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Arrivals for Efficiency Computation

2009-11-19T17:36:20Z

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-	[[Arrivals for Efficiency Computation]] All flight arrivals to the ASPM77 airports. In addition to commercial itinerant operations, also includes general aviation and military flights and local operations. Includes some partial records with incomplete data. Intended to provide a complete representation of traffic to the ASPM77 airports.	+	[[Arrivals for Efficiency Computation]] All observed flight arrivals to the ASPM77 airports. In addition to commercial itinerant operations, also includes general aviation and military flights and local operations. Includes some partial records with incomplete data. Intended to provide a complete representation of traffic to the ASPM77 airports.

APM: Definitions of Variables

2009-11-19T17:27:39Z

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	*'''Arrival Airport.''' Three- or four-letter code identifying the arrival airport.		*'''Arrival Airport.''' Three- or four-letter code identifying the arrival airport.
	*'''Arrival Date.''' Date of arrival of selected flight.		*'''Arrival Date.''' Date of arrival of selected flight.
-	*'''Arrivals For Metric Computation.''' Flight arrivals used for calculating metrics in ASPM. Only flight records that meet the following criteria are included: itinerant flights to or from one of the ASPM 77 Airports or operated by one of the ASPM Carriers (currently 23) with actual arrival and departure and flight plan times that are reported or can be estimated from the other flight record data. General aviation~~, military flights,~~ and ~~some international~~ flights are excluded. Arrivals for Metric Computation are aggregated based on the scheduled arrival time if available, otherwise the flight plan arrival time is used.	+	*'''Arrivals For Metric Computation.''' Flight arrivals used for calculating metrics in ASPM. Only flight records that meet the following criteria are included: itinerant flights to or from one of the ASPM 77 Airports or operated by one of the ASPM Carriers (currently 23) with actual arrival and departure and flight plan times that are reported or can be estimated from the other flight record data. General aviation and military flights are excluded. Arrivals for Metric Computation are aggregated based on the scheduled arrival time if available, otherwise the flight plan arrival time is used.
	*'''Arrivals with EDCT.''' Arrivals with Expected Departure Clearance Time (EDCT) delay, i.e., flights held by FAA at the departure airport due to problems at the arrival airport. EDCT hold delay is computed by comparing EDCT Wheels Off Time to [[Enhanced Traffic Management System (ETMS)\|ETMS]] Planned Wheels Off.		*'''Arrivals with EDCT.''' Arrivals with Expected Departure Clearance Time (EDCT) delay, i.e., flights held by FAA at the departure airport due to problems at the arrival airport. EDCT hold delay is computed by comparing EDCT Wheels Off Time to [[Enhanced Traffic Management System (ETMS)\|ETMS]] Planned Wheels Off.
	*'''[[ASQP]] Reported [[Types of Delay\|Carrier Delay]].''' The number of minutes of delay specifically due to the carrier, for flights that arrived 15 minutes or more past the scheduled arrival time.		*'''[[ASQP]] Reported [[Types of Delay\|Carrier Delay]].''' The number of minutes of delay specifically due to the carrier, for flights that arrived 15 minutes or more past the scheduled arrival time.
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	*'''Departure Airport.''' Three- or four-letter code identifying the departure airport.		*'''Departure Airport.''' Three- or four-letter code identifying the departure airport.
	*'''Departure Date.''' Date of departure of selected flight.		*'''Departure Date.''' Date of departure of selected flight.
-	*'''Departures For Metric Computation.''' Flight departures used for calculating metrics in ASPM. Only flight records that meet the following criteria are included: itinerant flights to or from one of the ASPM 77 Airports or operated by one of the ASPM Carriers (currently 23) with actual arrival and departure and flight plan times that are reported or can be estimated from the other flight record data. General ~~avaiation, military,~~ and ~~some international~~ flights are excluded. Departures for Metric Computation are aggregated based on the scheduled departure time if available, otherwise the flight plan departure time is used.	+	*'''Departures For Metric Computation.''' Flight departures used for calculating metrics in ASPM. Only flight records that meet the following criteria are included: itinerant flights to or from one of the ASPM 77 Airports or operated by one of the ASPM Carriers (currently 23) with actual arrival and departure and flight plan times that are reported or can be estimated from the other flight record data. General aviation and military flights are excluded. Departures for Metric Computation are aggregated based on the scheduled departure time if available, otherwise the flight plan departure time is used.
	*'''DZ.''' Departure message time sent by host computer to ETMS when a flight is activated.		*'''DZ.''' Departure message time sent by host computer to ETMS when a flight is activated.
	*'''Early Flight.''' A departure (Gate Out) or arrival (Gate In) that occurs before the scheduled time or flight plan time. Early flights are represented as a [[APM: Negative Values in Reports\|negative value]] for metrics calculation.		*'''Early Flight.''' A departure (Gate Out) or arrival (Gate In) that occurs before the scheduled time or flight plan time. Early flights are represented as a [[APM: Negative Values in Reports\|negative value]] for metrics calculation.

Arrivals for Metric Computation

2009-11-19T17:23:38Z

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-	Arrivals for Metric Computation are flight records used for calculating metrics in ASPM. Only flight records that meet the following criteria are included: itinerant flights to or from one of the ASPM 77 Airports or operated by one of the ASPM Carriers (currently 23) with actual arrival and departure and flight plan times that are reported or can be estimated from the other flight information available. General aviation and military flights~~, and some international arrivals~~ are excluded. Also see [[Arrivals for Efficiency Computation]].	+	Arrivals for Metric Computation are flight records used for calculating metrics in ASPM. Only flight records that meet the following criteria are included: itinerant flights to or from one of the ASPM 77 Airports or operated by one of the ASPM Carriers (currently 23) with actual arrival and departure and flight plan times that are reported or can be estimated from the other flight information available. General aviation and military flights are excluded. Also see [[Arrivals for Efficiency Computation]].

APM Efficiency: Definitions of Variables

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	*'''Arrival Demand (System Perspective).''' The number of aircraft that intend to land at a specific airport by unit of time. Arrival demand is reported by quarter hour. The start of demand corresponds to Actual Wheels off plus Estimated Time Enroute. End of demand corresponds to the Actual Wheels On time derived from next day [[OOOI Data\|OOOI]] data or [[Airline Service Quality Performance (ASQP)\|ASQP]]. For flights with missing Actual Wheels Off Time, an estimated value may be derived from the DZ message. If there is an EDCT on a flight, then the Start of Demand is equal to Wheels Off Time plus Estimated Time Enroute minus the delay due to the flight having an EDCT. A single flight may produce more than one-quarter hour demand units if the difference between the Estimated Wheels On and Actual Wheels On Time spans more than one quarter hour period. The Start of Demand time may be adjusted for flights with start and end of demand times separated by 15 or fewer minutes, so that there is only one demand quarter.		*'''Arrival Demand (System Perspective).''' The number of aircraft that intend to land at a specific airport by unit of time. Arrival demand is reported by quarter hour. The start of demand corresponds to Actual Wheels off plus Estimated Time Enroute. End of demand corresponds to the Actual Wheels On time derived from next day [[OOOI Data\|OOOI]] data or [[Airline Service Quality Performance (ASQP)\|ASQP]]. For flights with missing Actual Wheels Off Time, an estimated value may be derived from the DZ message. If there is an EDCT on a flight, then the Start of Demand is equal to Wheels Off Time plus Estimated Time Enroute minus the delay due to the flight having an EDCT. A single flight may produce more than one-quarter hour demand units if the difference between the Estimated Wheels On and Actual Wheels On Time spans more than one quarter hour period. The Start of Demand time may be adjusted for flights with start and end of demand times separated by 15 or fewer minutes, so that there is only one demand quarter.
	*'''Arrival Efficiency.''' The ratio of Arrivals for Efficiency Computation to the lesser of the Efficiency AAR or Arrival Demand for a given runway configuration, meteorological conditions, and time period, expressed as a percentage. Arrival Efficiency is limited to a maximum of 100 percent.		*'''Arrival Efficiency.''' The ratio of Arrivals for Efficiency Computation to the lesser of the Efficiency AAR or Arrival Demand for a given runway configuration, meteorological conditions, and time period, expressed as a percentage. Arrival Efficiency is limited to a maximum of 100 percent.
-	*'''Arrivals For Efficiency Computation.''' ~~The total number of~~ observed arrivals. ~~This number~~ includes ~~non-[[ASPM System Overview\|ASPM]] carriers and~~ general aviation and military flights.	+	*'''Arrivals For Efficiency Computation.''' All observed flight arrivals to the ASPM77 airports. In addition to commercial itinerant operations, also includes general aviation and military flights and local operations. Includes some partial records with incomplete data. Intended to provide a complete representation of arrivals to the ASPM77 airports.
	*'''AZ Time.''' The time the aircraft lands on the runway. This field is provided by [[Airline Service Quality Performance (ASQP)\|ASQP]] or ARINC data, otherwise it is estimated from the AZ (arrival) message.		*'''AZ Time.''' The time the aircraft lands on the runway. This field is provided by [[Airline Service Quality Performance (ASQP)\|ASQP]] or ARINC data, otherwise it is estimated from the AZ (arrival) message.
	*'''Base on Departures or Arrivals. (System Perspective) ''' Filter option allowing user to base the report on Departures only or Arrivals only.		*'''Base on Departures or Arrivals. (System Perspective) ''' Filter option allowing user to base the report on Departures only or Arrivals only.
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	*'''Departure Demand.''' The number of aircraft that are ready to depart from the airport. Departure Demand is reported by quarter hour, and a single aircraft may be counted in multiple quarter hours if its Scheduled Departure Time and Actual Departure Time differ by more than 15 minutes.		*'''Departure Demand.''' The number of aircraft that are ready to depart from the airport. Departure Demand is reported by quarter hour, and a single aircraft may be counted in multiple quarter hours if its Scheduled Departure Time and Actual Departure Time differ by more than 15 minutes.
	*'''Departure Efficiency.''' The ratio of Departures for Efficiency Computation to the lower of the ADR or departure demand for a given runway configuration, meteorological conditions, and time period, expressed as a percentage. Departure Efficiency rate is limited to a maximum of 100 percent.		*'''Departure Efficiency.''' The ratio of Departures for Efficiency Computation to the lower of the ADR or departure demand for a given runway configuration, meteorological conditions, and time period, expressed as a percentage. Departure Efficiency rate is limited to a maximum of 100 percent.
-	*'''Departures For Efficiency Computation.''' ~~The total number of~~ observed departures. ~~This number~~ includes ~~non-[ASPM System Overview\|ASPM]] carriers and~~ general aviation and military flights.	+	*'''Departures For Efficiency Computation.''' All observed flight departures from the ASPM77 airports. In addition to commercial itinerant operations, also includes general aviation and military flights and local operations. Includes some partial records with incomplete data. Intended to provide a complete representation of departures from the ASPM77 airports.
	*'''Domestic Carrier (All, Yes, No).''' Indicates whether or not the carrier operates within the United States.		*'''Domestic Carrier (All, Yes, No).''' Indicates whether or not the carrier operates within the United States.
	*'''EDCT Delay.''' The minutes of Expected Departure Clearance Time (EDCT) delay. A flight may have been given an EDCT hold and not accumulated any EDCT delay if the Flight Plan Wheels Off time is later than the EDCT Wheels Off time. Any accumulated EDCT delay from a departure airport will cause the arrival airport Start of Demand to be backed up to an earlier time by the EDCT delay amount, which may cause additional demand quarters. All EDCT will be recorded by an EDCT Wheels Off time on the individual flight per page report.		*'''EDCT Delay.''' The minutes of Expected Departure Clearance Time (EDCT) delay. A flight may have been given an EDCT hold and not accumulated any EDCT delay if the Flight Plan Wheels Off time is later than the EDCT Wheels Off time. Any accumulated EDCT delay from a departure airport will cause the arrival airport Start of Demand to be backed up to an earlier time by the EDCT delay amount, which may cause additional demand quarters. All EDCT will be recorded by an EDCT Wheels Off time on the individual flight per page report.

Arrivals for Efficiency Computation

2009-11-19T17:15:16Z

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-	[[Arrivals for Efficiency Computation]] ~~are a subset of the [[ETMSC]] which include the records that depart from or arrive at one of~~ the ~~[[ASPM Airports\|ASPM 77]]~~ airports. ~~This set does included~~ general aviation and military flights and ~~is intended~~ to ~~give~~ a ~~better~~ representation ~~of the volume~~ of traffic ~~at an airport. Because this set does include general aviation, military, and partial records, Arrivals for Efficiency Computation does not meet~~ the ~~minimum requirement for [[Arrivals for Metric Computation]]~~.	+	[[Arrivals for Efficiency Computation]] All flight arrivals to the ASPM77 airports. In addition to commercial itinerant operations, also includes general aviation and military flights and local operations. Includes some partial records with incomplete data. Intended to provide a complete representation of traffic to the ASPM77 airports.

Arrivals for Metric Computation

2009-11-19T16:04:27Z

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-	Arrivals for Metric Computation are flight records used for calculating metrics in ASPM. Only flight records that meet the following criteria are included: itinerant flights to or from one of the ASPM 77 Airports or operated by one of the ASPM Carriers (currently 23) with actual arrival and departure and flight plan times that are reported or can be estimated from the other flight information available. ~~This set of flights does not include general~~ aviation or military flights. Also see [[Arrivals for Efficiency Computation]].	+	Arrivals for Metric Computation are flight records used for calculating metrics in ASPM. Only flight records that meet the following criteria are included: itinerant flights to or from one of the ASPM 77 Airports or operated by one of the ASPM Carriers (currently 23) with actual arrival and departure and flight plan times that are reported or can be estimated from the other flight information available. General aviation and military flights, and some international arrivals are excluded. Also see [[Arrivals for Efficiency Computation]].

APM: Definitions of Variables

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	*'''Arrival Airport.''' Three- or four-letter code identifying the arrival airport.		*'''Arrival Airport.''' Three- or four-letter code identifying the arrival airport.
	*'''Arrival Date.''' Date of arrival of selected flight.		*'''Arrival Date.''' Date of arrival of selected flight.
-	*'''Arrivals For Metric Computation.''' ~~Arrivals with a flight record containing an AZ and DZ message,~~ used for ~~ASPM~~ metrics. General ~~Aviation~~, ~~Military~~ and some international flights are excluded. Arrivals for Metric Computation are aggregated based on the scheduled arrival time if available, otherwise the flight plan arrival time is used.	+	*'''Arrivals For Metric Computation.''' Flight arrivals used for calculating metrics in ASPM. Only flight records that meet the following criteria are included: itinerant flights to or from one of the ASPM 77 Airports or operated by one of the ASPM Carriers (currently 23) with actual arrival and departure and flight plan times that are reported or can be estimated from the other flight record data. General aviation, military flights, and some international flights are excluded. Arrivals for Metric Computation are aggregated based on the scheduled arrival time if available, otherwise the flight plan arrival time is used.
	*'''Arrivals with EDCT.''' Arrivals with Expected Departure Clearance Time (EDCT) delay, i.e., flights held by FAA at the departure airport due to problems at the arrival airport. EDCT hold delay is computed by comparing EDCT Wheels Off Time to [[Enhanced Traffic Management System (ETMS)\|ETMS]] Planned Wheels Off.		*'''Arrivals with EDCT.''' Arrivals with Expected Departure Clearance Time (EDCT) delay, i.e., flights held by FAA at the departure airport due to problems at the arrival airport. EDCT hold delay is computed by comparing EDCT Wheels Off Time to [[Enhanced Traffic Management System (ETMS)\|ETMS]] Planned Wheels Off.
	*'''[[ASQP]] Reported [[Types of Delay\|Carrier Delay]].''' The number of minutes of delay specifically due to the carrier, for flights that arrived 15 minutes or more past the scheduled arrival time.		*'''[[ASQP]] Reported [[Types of Delay\|Carrier Delay]].''' The number of minutes of delay specifically due to the carrier, for flights that arrived 15 minutes or more past the scheduled arrival time.
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	*'''Departure Airport.''' Three- or four-letter code identifying the departure airport.		*'''Departure Airport.''' Three- or four-letter code identifying the departure airport.
	*'''Departure Date.''' Date of departure of selected flight.		*'''Departure Date.''' Date of departure of selected flight.
-	*'''Departures For Metric Computation.''' ~~The count of departure flights having full record (flight records with AZ and DZ messages)~~ used for the [[ASPM ~~System Overview\|~~ASPM~~]] metrics~~. General ~~aviation~~, military and some international flights are excluded. Departures ~~For~~ Metric Computation are aggregated based on the scheduled ~~airport~~ departure.	+	*'''Departures For Metric Computation.''' Flight departures used for calculating metrics in ASPM. Only flight records that meet the following criteria are included: itinerant flights to or from one of the ASPM 77 Airports or operated by one of the ASPM Carriers (currently 23) with actual arrival and departure and flight plan times that are reported or can be estimated from the other flight record data. General avaiation, military, and some international flights are excluded. Departures for Metric Computation are aggregated based on the scheduled departure time if available, otherwise the flight plan departure time is used.
	*'''DZ.''' Departure message time sent by host computer to ETMS when a flight is activated.		*'''DZ.''' Departure message time sent by host computer to ETMS when a flight is activated.
	*'''Early Flight.''' A departure (Gate Out) or arrival (Gate In) that occurs before the scheduled time or flight plan time. Early flights are represented as a [[APM: Negative Values in Reports\|negative value]] for metrics calculation.		*'''Early Flight.''' A departure (Gate Out) or arrival (Gate In) that occurs before the scheduled time or flight plan time. Early flights are represented as a [[APM: Negative Values in Reports\|negative value]] for metrics calculation.

Arrivals for Metric Computation

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-	Arrivals for Metric Computation are flight records ~~which are~~ used for calculating metrics in ASPM. ~~These~~ records are ~~a subset~~ of ~~[[ETMSC]] records,~~ and ~~must have DZ~~ and AZ times. This set of flights does not include general aviation or military flights ~~but does include the flights to or from one of the [[ASPM Airports\|ASPM 77]] airports. This subset includes the [[Airline Service Quality Performance (ASQP)\|ASQP]] records when available~~. Also see [[Arrivals for Efficiency Computation]].	+	Arrivals for Metric Computation are flight records used for calculating metrics in ASPM. Only flight records that meet the following criteria are included: itinerant flights to or from one of the ASPM 77 Airports or operated by one of the ASPM Carriers (currently 23) with actual arrival and departure and flight plan times that are reported or can be estimated from the other flight information available. This set of flights does not include general aviation or military flights. Also see [[Arrivals for Efficiency Computation]].

APM: Definitions of Variables

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APM: Analysis: Delayed Flights

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Delayed Flights Report in City Pair Analysis:

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	===Delayed Flights Report in Airport Analysis===		===Delayed Flights Report in Airport Analysis===
-	The Delayed Flights report in '''Airport Analysis''' provides information about the number and ~~percentages~~ of ~~delayed departure flights~~ and delayed ~~arrivals~~ for a selected airport or group of airports.	+	The Delayed Flights report in '''Airport Analysis''' provides information about the number and percentage of flight departures and arrivals delayed 15 or more minutes for a selected airport or group of airports.

	[[Image:APM_AirportDelayed.jpg\|700 px\|center\|frame]]		[[Image:APM_AirportDelayed.jpg\|700 px\|center\|frame]]
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	===Delayed Flights Report in City Pair Analysis===		===Delayed Flights Report in City Pair Analysis===
-	The All Flights report in '''City Pair Analysis''' provides information about the number and ~~percentages~~ of ~~delayed departure flights~~ and delayed ~~arrivals~~ between two selected ~~airport~~ or groups of airports.	+	The All Flights report in '''City Pair Analysis''' provides information about the number and percentage of flight departures and arrivals delayed 15 or more minutes, between two selected airports or groups of airports.

	[[Image:APM_CityDelayed.jpg\|700 px\|center\|frame]]		[[Image:APM_CityDelayed.jpg\|700 px\|center\|frame]]

APM Analysis Manual

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Display:

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	In '''Individual Flights''', the only available report is the [[APM: Individual Flights: Flight Data Report\|Flight Data Report]], which will be generated by default when you click on the 'Run' tab.		In '''Individual Flights''', the only available report is the [[APM: Individual Flights: Flight Data Report\|Flight Data Report]], which will be generated by default when you click on the 'Run' tab.
		+
		+
		+	'''Note:''' The Delayed Flights and Delayed Flights Comparison reports display information on Delays of 15 minutes or more. The Individual Flights report displays information on flights delayed one minute or more.

	===Format===		===Format===

APM: Analysis: Delayed Flights

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	===Delayed Flights Report in Airport Analysis===		===Delayed Flights Report in Airport Analysis===
-	The ~~All~~ Flights report in '''Airport Analysis''' provides information about the number and percentages of delayed departure flights and delayed arrivals for a selected airport or group of airports.	+	The Delayed Flights report in '''Airport Analysis''' provides information about the number and percentages of delayed departure flights and delayed arrivals for a selected airport or group of airports.

	[[Image:APM_AirportDelayed.jpg\|700 px\|center\|frame]]		[[Image:APM_AirportDelayed.jpg\|700 px\|center\|frame]]

APM Efficiency Manual

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Filters:

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	*Runways		*Runways
	*Use Adjusted Time		*Use Adjusted Time
-	*Approach Conditions (All, ~~IAC~~, ~~VAC~~)	+	*Approach Conditions (All, IMC, VMC)

	[[APM Efficiency: Operational Counts Report\|Operational Counts Report]]:		[[APM Efficiency: Operational Counts Report\|Operational Counts Report]]:

OPSNET: Facility Classification

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	\|- ! valign="top"		\|- ! valign="top"
-	\| Combination Non-Radar Approach ~~Central~~ and Tower without Radar	+	\| Combination Non-Radar Approach Control and Tower without Radar
	\| An air traffic control terminal that provides air traffic control services for the airport at which the tower is located and without the use of radar, approach and departure control services to aircraft operating under Instrument Flight Rules (IFR) to and from one or more adjacent airports.		\| An air traffic control terminal that provides air traffic control services for the airport at which the tower is located and without the use of radar, approach and departure control services to aircraft operating under Instrument Flight Rules (IFR) to and from one or more adjacent airports.

APM Efficiency: Definitions of Variables

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	*'''ADR Plus Capacity AAR.''' The sum of the ADR and Capacity AAR.		*'''ADR Plus Capacity AAR.''' The sum of the ADR and Capacity AAR.
	*'''Aircraft.''' Four-character code identifying the type of aircraft. Also available as filter option for choosing the aircraft code.		*'''Aircraft.''' Four-character code identifying the type of aircraft. Also available as filter option for choosing the aircraft code.
-	*'''Approach Conditions (All, ~~IAC~~, ~~VAC~~).''' Filter option sorting approach conditions as All, Instrument ~~Approach~~ Conditions (~~IAC~~), and Visual ~~Approach~~ Conditions (~~VAC~~).	+	*'''Approach Conditions (All, IMC, VMC).''' Filter option sorting approach conditions as All, Instrument Meteorological Conditions (IMC), and Visual Meteorological Conditions (VMC).
	*'''Arrival Airport.''' Three- or four-letter code identifying the airport of arrival.		*'''Arrival Airport.''' Three- or four-letter code identifying the airport of arrival.
	*'''Arrival Demand (Airport Perspective).''' The number of aircraft that intend to land at a specific airport by quarter hour. The [[TAER]] arrival demand starts at 100 miles from the airport and ends based on the average time to Wheels On or Actual AZ Wheels On time. EDCTs have no effect. The Start of Demand time may be adjusted for flights with start and end of demand times separated by 5 or fewer minutes, so that there is only one five-minute demand period.		*'''Arrival Demand (Airport Perspective).''' The number of aircraft that intend to land at a specific airport by quarter hour. The [[TAER]] arrival demand starts at 100 miles from the airport and ends based on the average time to Wheels On or Actual AZ Wheels On time. EDCTs have no effect. The Start of Demand time may be adjusted for flights with start and end of demand times separated by 5 or fewer minutes, so that there is only one five-minute demand period.

ETMSC

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	==Data Sources and Update Cycle==		==Data Sources and Update Cycle==
-	The flight counts reported in ETMSC are derived from flight records assembled by the FAA Air Traffic Airspace (ATA) Lab by threading the many ETMS messages together. These flight records may be incomplete records when one end is missing, or when only planned components are available. For example, flights may be missing DZ or AZ time (or both), or may have incorrect or missing airport codes and equipment codes. Missing AZ or DZ may cause the flight to be assigned to the 25 hour~~. Also see [[Arrivals for Metric Computation\|Metric Computation]]~~.	+	The flight counts reported in ETMSC are derived from flight records assembled by the FAA Air Traffic Airspace (ATA) Lab by threading the many ETMS messages together. These flight records may be incomplete records when one end is missing, or when only planned components are available. For example, flights may be missing DZ or AZ time (or both), or may have incorrect or missing airport codes and equipment codes. Missing AZ or DZ may cause the flight to be assigned to the 25 hour.

	ETMSC data is available by day from January 2000 and is updated monthly.		ETMSC data is available by day from January 2000 and is updated monthly.

Arrivals for Metric Computation

2009-11-17T19:04:15Z

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-	Arrivals for Metric Computation are flight records which are used for calculating metrics in ASPM. These records are a subset of [[ETMSC]] records, and must have DZ and AZ times. ~~These~~ flights do not include general aviation or military flights but does ~~have~~ the flights to or from one of the [[ASPM Airports\|ASPM 77]] airports. This subset includes the [[Airline Service Quality Performance (ASQP)\|ASQP]] records when available. Also see [[Arrivals for Efficiency Computation]].	+	Arrivals for Metric Computation are flight records which are used for calculating metrics in ASPM. These records are a subset of [[ETMSC]] records, and must have DZ and AZ times. This set of flights does not include general aviation or military flights but does include the flights to or from one of the [[ASPM Airports\|ASPM 77]] airports. This subset includes the [[Airline Service Quality Performance (ASQP)\|ASQP]] records when available. Also see [[Arrivals for Efficiency Computation]].

Arrivals for Efficiency Computation

2009-11-17T19:02:57Z

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-	[[Arrivals for Efficiency Computation]] are a subset of the [[ETMSC]] which include the records that depart from or arrive at one of the [[ASPM Airports\|ASPM 77]] airports. This set does included general aviation and military flights and is intended to give a better representation of the volume of traffic at an airport. Because this set does include general aviation, military, and partial records, Arrivals for Efficiency Computation not meet the minimum requirement for [[Arrivals for Metric Computation]].	+	[[Arrivals for Efficiency Computation]] are a subset of the [[ETMSC]] which include the records that depart from or arrive at one of the [[ASPM Airports\|ASPM 77]] airports. This set does included general aviation and military flights and is intended to give a better representation of the volume of traffic at an airport. Because this set does include general aviation, military, and partial records, Arrivals for Efficiency Computation does not meet the minimum requirement for [[Arrivals for Metric Computation]].

Arrivals for Metric Computation

2009-11-17T19:02:01Z

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-	Arrivals for Metric Computation are flight records which are used for calculating metrics in ASPM. These records are a subset of [[ETMSC]] records, and must have DZ, AZ times, do not include general aviation or military flights but does have the flights to or from one of the [[ASPM Airports\|ASPM 77]] airports. This subset includes the [[Airline Service Quality Performance (ASQP)\|ASQP]] records when available. Also see [[Arrivals for Efficiency Computation]].	+	Arrivals for Metric Computation are flight records which are used for calculating metrics in ASPM. These records are a subset of [[ETMSC]] records, and must have DZ and AZ times. These flights do not include general aviation or military flights but does have the flights to or from one of the [[ASPM Airports\|ASPM 77]] airports. This subset includes the [[Airline Service Quality Performance (ASQP)\|ASQP]] records when available. Also see [[Arrivals for Efficiency Computation]].

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	*'''Average EDCT For All Arrivals.''' The average Expected Departure Clearance Time (EDCT) delay for all arrivals by time period.		*'''Average EDCT For All Arrivals.''' The average Expected Departure Clearance Time (EDCT) delay for all arrivals by time period.
	*'''Average EDCT Where EDCT>0.''' The average Expected Departure Clearance Time (EDCT) delay limited to the arrivals having an EDCT delay.		*'''Average EDCT Where EDCT>0.''' The average Expected Departure Clearance Time (EDCT) delay limited to the arrivals having an EDCT delay.
-	*'''Average Gate Arrival Delay.''' The sum of late arrivals of 1 minute or more, divided by all arrivals. Late arrivals are derived from the difference between the Actual Gate In Time and the Scheduled Gate In Time.	+	*'''Average Gate Arrival Delay.''' The sum of minutes of delay for late arrivals of 1 minute or more, divided by all arrivals. Late arrivals are derived from the difference between the Actual Gate In Time and the Scheduled Gate In Time.
-	*'''Average Gate Departure Delay.''' The difference between Actual Gate Out time and Scheduled Gate Out time, in minutes.	+	*'''Average Gate Departure Delay.''' The sum of minutes of delay for late departures of 1 minute or more, divided by all departures. Late departures are derived from the difference between Actual Gate Out time and Scheduled Gate Out time, in minutes.
	*'''Average Minutes of Delay per Delayed Airport Arrival.''' The average delay for flights with a Wheels On Time delayed 15 minutes or more compared to the schedule or flight plan estimated Wheels On Time. See [[APM: Estimation Techniques]].		*'''Average Minutes of Delay per Delayed Airport Arrival.''' The average delay for flights with a Wheels On Time delayed 15 minutes or more compared to the schedule or flight plan estimated Wheels On Time. See [[APM: Estimation Techniques]].
	*'''Average Minutes of Delay per Delayed Airport Departure.''' The average delay for flights with a Wheels Off Time delayed 15 minutes or more compared to the schedule or flight plan estimated Wheels Off Time. See [[APM: Estimation Techniques]].		*'''Average Minutes of Delay per Delayed Airport Departure.''' The average delay for flights with a Wheels Off Time delayed 15 minutes or more compared to the schedule or flight plan estimated Wheels Off Time. See [[APM: Estimation Techniques]].
	*'''Average Minutes of Delay per Delayed Gate Arrival.''' The average delay for all the flights with an actual Gate In Time delayed 15 minutes or more compared to the schedule or flight plan Gate In Time.		*'''Average Minutes of Delay per Delayed Gate Arrival.''' The average delay for all the flights with an actual Gate In Time delayed 15 minutes or more compared to the schedule or flight plan Gate In Time.
	*'''Average Minutes of Delay per Delayed Gate Departure.''' The average delay for all flights with an actual Gate Out Time delayed 15 minutes or more compared to the schedule or flight plan Gate Out Time.		*'''Average Minutes of Delay per Delayed Gate Departure.''' The average delay for all flights with an actual Gate Out Time delayed 15 minutes or more compared to the schedule or flight plan Gate Out Time.
-	*'''Average Taxi In Delay.''' The difference between Taxi In Time and Unimpeded Taxi In Time, in minutes. Taxi In Delay may occur when a gate is not available for an arriving aircraft.	+	*'''Average Taxi In Delay.''' The difference between Taxi In Time and Unimpeded Taxi In Time, in minutes, divided by the number of flights. Taxi In Delay may occur when a gate is not available for an arriving aircraft.
	*'''Average Taxi Out Delay.''' The difference between Taxi Out Time and Unimpeded Taxi Out time (by airport, carrier, season), in minutes.		*'''Average Taxi Out Delay.''' The difference between Taxi Out Time and Unimpeded Taxi Out time (by airport, carrier, season), in minutes.
-	*'''Average Taxi Out Time.''' The difference between Actual Gate Out time and Actual Wheels Off time, in minutes. Taxi out time is observed for flights for which [[OOOI Data\|OOOI]] data are available, otherwise it is estimated. See [[APM: Estimation Techniques]].	+	*'''Average Taxi Out Time.''' The difference between Actual Gate Out time and Actual Wheels Off time, in minutes, divided by the total number of flights. Taxi out time is observed for flights for which [[OOOI Data\|OOOI]] data are available, otherwise it is estimated. See [[APM: Estimation Techniques]].
	*'''AZ.''' Arrival message time sent by host computer to ETMS when a flight is completed.		*'''AZ.''' Arrival message time sent by host computer to ETMS when a flight is completed.
	*'''Block Delay.''' The difference between Actual Block Time and Scheduled Block Time, in minutes.		*'''Block Delay.''' The difference between Actual Block Time and Scheduled Block Time, in minutes.