Digital AIM Training - AIXM Notes: EUROCONTROL Copyright 2011

Digital AIM Training - AIXM Content Context & History Overview of the Procedure Model Procedure Transition, SegmentLeg and SegmentPoint Approach Conditions (minima…) Circling Area MSA TAA Miscellaneous Some open issues EUROCONTROL Copyright 2011

Procedure = SID, STAR or Approach

History of the AIXM Procedure Model AIXM 3.3 / AIXM 4.5: Objective: provide an encoding for procedure charts, in support of EAD SDO Based on Arinc424-14 ProcedureLeg was the key of the Procedure model Some non-Arinc legs (time-based legs PT/FT) were included

AIXM 4.5 Procedure Model

AIXM 4.5 Procedure Model

History of the Procedure Model AIXM 5.0/5.1 Better support the encoding of RNAV procedures published in AIPs Support the procedure design process Upgrade the model with recent changes in PANS-OPS and Arinc424 (FAS Datablock)

History of the Procedure Model AIXM 5.0/5.1 Procedure Model goals Intended for: support digital transfer of procedure data from procedure designer to AIS office support digital transfer of procedure data and further to the data users (data houses, charting office, etc.); this includes conversion of AIXM data into ARINC 424 Might be useful for: Procedure design (with extensions) Direct FMS encoding? (nobody tried that yet…)

AIXM 5.1 Procedure Model - Overview The terminal area procedures and related concepts (MSA, TAA...) Navaids Points Guidance Service, Point Reference, and Segment Points Holding Holding Patterns Service For Information services (ATIS) and ATC services Shared.Surface Assesment

AIXM 5.1 Procedure Model - Overview Designator SID & STAR: designator (+ name?) Approach: name + 6 first attributes of class InstrumentApproachProcedure approachPrefix = Blank approachType = VOR multipleIdentification = X copterTrack = Blank circlingIdentification = Blank courseReversalInstruction = Blank

AIXM 5.1 Procedure Model - Overview Attribute RNAV is used to identify an RNAV procedure For an approach, attribute approachType can also carry the value “RNAV” Connection SID/STAR/Appr -> RunwayDirection is realised through class LandingTakeOffAreaCollection

AIXM 5.1 Procedure Model - Overview

Procedure design vs Procedure encoding The AIXM model defines the class SegmentLeg which represents an elementary portion of a Procedure A SegmentLeg is associated to a Procedure. A procedure is designed by attaching several SegmentLeg to the procedure A Procedure can be divided into a series of Procedure Transitions More optimised for Procedure Encoding Procedure Design Procedure Encoding

Procedure Transition & SegmentLeg runway IAF 1 IAF 2 IF MAP 3 “approach transitions” 1 final approach 1 missed approach WP 4 FAF leg 1 WPT 1 WP 2 WP 3 leg 2 A Procedure can be divided in a series of Procedure Transitions A Transition can be represented as a sequence of SegmentLeg A Transition can be associated with a geographical Curve (for charting and procedure design - not intended for flight)

Procedure Transition & SegmentLeg Approach Transition GEBTI Approach Transition VFA Final Approach Missed Approach SegmentLeg HoldingPattern

SegmentLeg SegmentLeg contains a set of attributes inspired from the Arinc424 specification Note: It is not mandatory to use Arinc424 concepts => legPath SegmentLeg is an abstract class which is specialised: - 1st specialisation per type of procedure - 2nd specialisation per type of transition for approach procedures For a SID For a STAR For an Approach For a missed approach For an approach transition For a final approach

RNAV – Path Terminator Leg Type Digital AIM Training - AIXM RNAV – Path Terminator Leg Type Path Terminator F Constant DME arc Course to Direct Track Course from a fix to Holding pattern Initial Constant radius Track between Heading to C D H R A I V T C A D F I M R Altitude Distance DME distance Next leg Manual termination Radial termination Fix EUROCONTROL Copyright 2011

Path Terminators 14 RNAV Types Digital AIM Training - AIXM Path Terminators 14 RNAV Types Course to an Altitude - CA Course to a Fix - CF Direct to a Fix - DF Fix to an Altitude - FA Fix to a Manual Termination - FM Racetrack Course Reversal (Alt Term) - HA Racetrack (Single Circuit - Fix Term) - HF Racetrack (Manual Termination) - HM Initial Fix - IF Track to a Fix - TF Constant Radius Arc - RF Heading to an Altitude - VA Heading to an Intercept - VI Heading to a Manual Termination - VM EUROCONTROL Copyright 2011

Digital AIM Training - AIXM Course to an Altitude Unspecified Position Course is flown making adjustment for wind 090 CA Leg EUROCONTROL Copyright 2011

SegmentLeg & SegmentPoint type = IF InitialLeg 1 + startPoint type = CF course = 276 courseType = MAG InitialLeg 2 + endPoint Waypoint = NO Indicator FACF = Yes Role = IF TerminalSegmentPoint role = RAD_DME PointReference angle = 96 (276-180) angleType = MAG distance = 9 NM Angle/Distance Indication Designator = IIF Navaid designator = GEBTI type = ICAO DesignatedPoint role = IAF Waypoint = YES TerminalSegmentPoint

SegmentLeg - Particular cases endConditionDesignator = ALTITUDE lowerLimitAltitude = 2000 ft MissedApproachLeg endConditionDesignator = INTERCEPT MissedApproachLeg distance = 18 NM DistanceIndication designator = TOU Navaid +distance

AircraftCharacteristics Approach Conditions finalApproachPath = STRAIGHT_IN ApproachCondition aircraftLandingCategory = C AircraftCharacteristics altitude = 218 ft altitudeCode = OCA altitudeReference = MSL height = 200 ft heightCode = OCH heightReference = HAT Minima

Circling Area

MSA Navaid Designator = VFA SafeAltitudeArea safeAreaType = MSA +centrePoint MSA safeAreaType = MSA SafeAltitudeArea arcDirection = CWA (clockwise Arc) fromAngle = 284 toAngle = 104 angleDirectionReference = TO innerDistance = 0 NM outerDistance = 25 NM lowerLimit = 1400 ft lowerLimitReference = MSL CircleSector 2 arcDirection = CWA (clockwise Arc) fromAngle = 104 toAngle = 284 angleDirectionReference = TO innerDistance = 0 NM outerDistance = 25 NM lowerLimit = 3000 ft lowerLimitReference = MSL CircleSector 1

TAA +IF +IAF TerminalArrivalArea safeAreaType = LEFT_BASE arcDirection = CWA (clockwise Arc) fromAngle = 83 toAngle = 173 angleDirectionReference = TO innerDistance = 15 NM outerDistance = 25 NM lowerLimit = 7100 ft lowerLimitReference = MSL CircleSector 1 safeAreaType = LEFT_BASE TerminalArrivalArea arcDirection = CWA (clockwise Arc) fromAngle = 83 toAngle = 173 angleDirectionReference = TO innerDistance = 0 NM outerDistance = 15 NM lowerLimit = 5000 ft lowerLimitReference = MSL CircleSector 2 designator = RIMOR DesignatedPoint +IAF designator = LC406 DesignatedPoint +IF

Miscellaneous - FAS datablock The FAS data block is defined for RNAV GNSS approaches with LPV minima (SBAS) guidanceSystem = LPV FinalLeg Note: The FAS DB can not be encoded as a whole (i.e. in one block) in AIXM 5.1 (E.g: AirportID) Extracted from RTCA DO229-D

Conclusion of AIXM seminar #1 Recommended navaid

Conclusion of AIXM seminar #1 Recommended navaid The current AIXM 5.1 encoding solution

Conclusion of AIXM seminar #1 Recommended navaid Point Reference Role

“Multi-branch” procedures

“Multi-branch” procedures ICAO Annex 11, Appendix 3 “The coded designator of a standard departure or arrival route instrument or visual, shall consist of: a) the coded designator or name-code of the significant point described in 2.1.1 a); followed by b) the validity indicator in 2.1.1 b); followed by c) the route indicator in 2.1.1 c), where required.” Example: ADOLA 5 B

“Multi-branch” procedures

“Multi-branch” procedures

“Multi-branch” procedures According to Annex 11, AIPs: multi-branch procedures do not exist? “common route” transitions have been introduced for FMS database size reasons AIXM 5 tries to support both views: individual procedures and multi-branch

“Multi-branch” procedures Procedure encoding workflow with AIXM Each leg belongs to one procedure No sequence number because it was assumed that start/end point data is sufficient to identify the order of the segments VEROR4A and VEROR4B are two different Procedure instances

“Multi-branch” procedures Procedure transitions can also be encoded “top-down”, using the pre-defined legs.

“Multi-branch” procedures Change proposal?

Digital AIM Training - AIXM Questions? Notes: EUROCONTROL Copyright 2011