FullDescription:TMA Operation

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ATFM slot swapping

Link Semantic Value
Term ATFM slot swapping
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Mandatory for


Contexts

SESAR

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Synonyms

slot swapping

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Abbreviation

Definition

An application that allows airlines to prioritise flights by exchanging the slot of one flight with the slot of another.

Initially limited to flights within the same airline, it now gives airspace users the opportunity to exchange the departure order of any two flights from different airlines penetrating the same constraint (airspace volume, arrival airport). This allows AUs, within commercial agreements, to reduce the delay of a commercially sensitive flight at the cost of another flight.

Definition Source

1st para: SESAR Joint Undertaking, User Driven Prioritisation Process, OSED, Project No. 07.06.04, Ed. 6

2nd para with detailed description: SESAR, Project: 7.6.4

Note

The possibility to extend it further to swapping between flights not sharing the same Most Penalising Regulation is under study. (source: SESAR, Project: 7.6.4)

Lexicon Release

Lexicon Release 2015.2

Advanced Continuous Descent Approach

Link Semantic Value
Term Advanced Continuous Descent Approach
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continuous descent approach (CDA)

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Abbreviation

A-CDA

Definition

the progressive implementation of harmonised procedures for CDAs in higher density traffic.

Definition Source

EUROCONTROL, doc. OI AOM-0702

Note

Continuous descent approaches are optimised for each airport arrival procedure. New controller tools and 3D trajectory management enable aircraft to fly, as far as possible, their individual optimum descent profile.

Adverse conditions

Link Semantic Value
Term adverse conditions
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SESAR

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CDM in adverse conditions

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adverse weather conditions

Abbreviation

Definition

Any event within the operational envelope of the airport, which has a significant negative impact on operational performance unless appropriate actions are organised.

Definition Source

SESAR Operational Service and Environment Definition (OSED) P.6.6.1, Ed.00.00.03, 20.01.2012

Note

This definition encompasses adverse weather conditions.


In most cases, the airport capacity will be affected. However, other Key Performance Areas may also be impacted (e.g. the predictability of operations may decrease). The consequence of adverse conditions at an airport may be arrival and departure delays and / or flight cancellations. In many cases, the ATM Network will also suffer from the disruption. (same source)

Lexicon Release

Lexicon Release 2015.2

Adverse weather conditions

Link Semantic Value
Term adverse weather conditions
Status


Mandatory for


Contexts

SESAR

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degraded weather conditions

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disruptive weather condition

Broader term

adverse conditions

Narrower term


Abbreviation

Definition

Degraded weather condition: a condition which might have a significant negative impact on airport performance unless a proper response is organized (i.e. the selection of an airport operating mode to respond to given degraded conditions and eventually the use of additional airport resources such as de-icing/anti-icing services). This would be the case when visibility is poor and/or in case of freezing conditions, precipitations, etc.

Definition Source

ATM Airport Performance Framework (ATMAP) Measuring Airport Airside and Nearby Airspace Performance, December 2009

Note

Lexicon Release

Lexicon Release 2015.2

Air traffic control clearance

Link Semantic Value
Term Air traffic control clearance
Status


Mandatory for

ICAO; EU

Contexts

SESAR

Categories


Synonyms

ATC clearance

clearance

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Abbreviation

Definition

Authorization for an aircraft to proceed under conditions specified by an air traffic control unit.

Definition Source

1. ICAO (2007) Official definition, PANS-ATM Procedures for Air Navigation Services — Air Traffic Management [Doc 4444] 2007, 15th ed. (Amdt 4, 15/11/2012)

2. SESAR Concept of Operations Step 2 Edition 2014 (Ed. 01.01.00)

Note

For convenience, the term “air traffic control clearance” is frequently abbreviated to “clearance” when used in appropriate contexts. The abbreviated term “clearance” may be prefixed by the words “taxi”, “take-off”, “departure”, “en-route”, “approach” or “landing” to indicate the particular portion of flight to which the air traffic control clearance relates.

Lexicon Release

Lexicon Release 2015.1

Closed path CDO procedures

Link Semantic Value
Term Closed path CDO procedures
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continuous descent operation (CDO)

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Abbreviation

Definition

Procedures coded with track to fix (TF) legs and fly-by waypoints. STARs that terminate with a link to an Instrument Approach Procedure should terminate at a fly-by waypoint. STARs that terminate with vector-based legs may be coded with fix to manual termination (FM) or heading to manual termination (VM) path terminators.

Definition Source

ICAO (2010) Doc 9931, Continuous Descent Operations (CDO) Manual

Note

Continuous descent operation

Link Semantic Value
Term continuous descent operation
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Mandatory for


Contexts

SESAR

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continuous descent approach (CDA)

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Abbreviation

CDO

Definition

An operation, enabled by airspace design, procedure design and ATC facilitation, in which an arriving aircraft descends continuously, to the greatest possible extent, by employing minimum engine thrust, ideally in a low drag configuration, prior to the final approach fix /final approach point.

Definition Source

1. ICAO (2010) Doc 9931, Continuous Descent Operations (CDO) Manual

2. SESAR Concept of Operations Step 2 Edition 2014 (Ed. 01.01.00)

Note

1.— An optimum CDO starts from the top of descent and uses descent profiles that reduce , segments of level flight, noise, fuel burn, emissions and controller/pilot communications, while increasing predictability to pilots and controllers and flight stability.

2.— A CDO initiated from the highest possible level in the enroute or arrival phases of flight will achieve the maximum reduction in fuel burn, noise, and emissions.

Lexicon Release

Lexicon Release 2015.1

Controlled Time of Arrival

Link Semantic Value
Term Controlled Time of Arrival
Status

working definition (on-going discussion)

Mandatory for


Contexts

SESAR

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Controlled Time Over

Required Time of Arrival

Broader term


Narrower term


Abbreviation

CTA

Definition

An ATM imposed time constraint on a defined metering point associated to an arrival runway, to be achieved within the required accuracy by the use of the avionics.

Definition Source

SESAR Concept of Operations Step 2 Edition 2014 (Ed. 01.01.00)

Note

Please note that the term Calculated Time of Arrival (CTA) is a different concept.

Lexicon Release

Lexicon Release 2015.1

Disruptive weather condition

Link Semantic Value
Term disruptive weather condition
Status


Mandatory for


Contexts

SESAR

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adverse weather conditions

nominal weather condition

Broader term

adverse conditions

Narrower term


Abbreviation

Definition

a condition which is very unlikely to occur, it has a severe impact on airport performance, but the airport does not have an appropriate organized response (this might be the case of heavy snow in Rome). In addition, convective weather might create disruptive conditions, even if the airport is well prepared to respond to weather.

Definition Source

ATM Airport Performance Framework (ATMAP) Measuring Airport Airside and Nearby Airspace Performance, December 2009

Note

Lexicon Release

Lexicon Release 2015.2

ETA min/max

Link Semantic Value
Term ETA min/max
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Mandatory for


Contexts

SESAR

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Estimated Time of Arrival (ETA)

Controlled Time of Arrival (CTA)

ADS-C ETA min/max report

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Abbreviation

Definition

The earliest/latest ETA at a waypoint, provided the aircraft flies the 4D Trajectory at its max/min allowable speed, wind/temp error is also taken into account, in order to guarantee that any CTA defined within associated ETA min/max interval will be satisfied with high probability.

Definition Source

SESAR Concept of Operations Step 2 Edition 2014 (Ed. 01.01.00)

Note

Lexicon Release

Lexicon Release 2015.1


MergeStrip tool

Link Semantic Value
Term MergeStrip tool
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continuous descent operation (CDO)

Point Merge

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Narrower term


Abbreviation

Definition

a tool designed to assist controllers in CDO sequencing and separation.

Definition Source

EUROCONTROL (2013) 3rd European CDO Workshop, Report and Actions

Note

The essence of the MergeStrip concept is that, in an extended environment, a dynamic system can be used to create relative spacing instead of a static map element with fixed lateral flight path.

...

MergeStrip components:

•Common route, for example final

•Merge points

•Relative Spacing Tool (here: plots on an imaginary centre line)

•High level concept of operation

•delaying manoeuvre if necessary (speed control or vectoring)

•using FMS capabilities, optimised flying towards one of the merge points

•speed control for maintaining relative spacing


Note Source

SESAR Joint Undertaking (2013) news [1]


Nominal weather condition

Link Semantic Value
Term nominal weather condition
Status


Mandatory for


Contexts

SESAR

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disruptive weather condition

adverse weather conditions

Broader term


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Abbreviation

Definition

a weather condition which is excellent or good to conduct airport operations: CAVOK, favourable winds, etc.

Definition Source

ATM Airport Performance Framework (ATMAP) Measuring Airport Airside and Nearby Airspace Performance, December 2009

Note

Lexicon Release

Lexicon Release 2015.2

Pair-wise separation

Link Semantic Value
Term pair-wise separation
Status


Mandatory for


Contexts

SESAR

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Abbreviation

PWS

Definition

1. Procedure designed for use between arrivals on final approach or between departures from the runway, based on an optimum adjusting of the needed separation between two aircraft taking into account their respective characteristics and giving Controllers more dynamic separation options.

2. A wake vortex separation based on individual aircraft type.

Definition Source

1. SESAR Concept of Operations Step 1 Edition 2013 (Ed. 01.02.00)

2. SESAR (2011) working package 6, Airport Definitions Team

Note

Lexicon Release

Lexicon Release 2015.1

Target Time

Link Semantic Value
Term Target Time
Status


Mandatory for


Contexts

SESAR

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Target Off-Block Time (TOBT)

Target Start Up Approval Time (TSAT)

Target Take-Off Time (TTOT)

Target Landing Time (TLDT)

milestone

Broader term


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Abbreviation

Definition

In A-CDM, a target time relates to the time of an airport milestone and serves as a "contract" between partners who are thus committed to achieving the milestone at this time. The time is derived only through a collaborative process and is used for milestone monitoring

Definition Source

SESAR, working package 6, Airport Definitions Team

Note

Lexicon Release

Lexicon Release 2015.2

Target Time of Arrival

Link Semantic Value
Term Target Time of Arrival
Status


Mandatory for


Contexts

SESAR

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Estimated Time of Arrival(ETA)

Controlled Time of Arrival (CTO)

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Narrower term


Abbreviation

TTA

Definition

An ATM computed arrival time. It is not a constraint but a progressively refined planning time that is used to coordinate between arrival and departure management applications.

Definition Source

SESAR Concept of Operations Step 2 Edition 2014 (Ed. 01.01.00)

Note

Lexicon Release

Lexicon Release 2015.1

Touchdown

Link Semantic Value
Term touchdown
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actual landing time

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Abbreviation

Definition

The point where the nominal glide path intercepts the runway.

Definition Source

ICAO (2001) Official definition, doc. 4444 PANS-ATM: Procedures for Air Navigation Services — Air Traffic Management

Note

'Touchdown' as defined above is only a datum and is not necessarily the actual point at which the aircraft will touch the runway. (same source)