NextGen Trajectory-Based Operations Status Update (cid:52) Environmental Working Group Operations Standing Committee May 17, 2010 Rose Ashford [email protected] 1 Outline (cid:52) • Key Technical Concepts in TBO • Current TBO Activities – RTCA ATMAC Trajectory Operations Working Group – FAA NextGen Mid-Term Concept of Operations – JPDO TBO Study Team WARNING! Most charts in this briefing copied from others 2 The Transformation to NextGen Procedural Based Control: OOuurr Control on Where We Think the MMiissssiioonn Surveillance Based Control: Aircraft Is Control on Where We Know the Aircraft Is Trajectory Based Control: Control on Where We Know the Aircraft Will Be Landmark Navigation Radio Beacons VOR/DME RNP Position Reports RADAR ADS-B DataComm 3 The Transformation to NextGen TBO in documents… JJPPDDOO TTBBOO SSttuuddyy TTeeaamm 22000099 RRTTCCAA TTaasskk FFoorrccee 55 TTrraajjeeccttoorryy--bbaasseedd OOppeerraattiioonnss ((TTBBOO)) RReeccoommmmeennddaattiioonnss OOppeerraattiioonnaall SScceennaarriiooss ffoorr 22002255 RRTTCCAA TTrraajjeeccttoorryy OOppeerraattiioonnss CCoonncceepptt ooff UUssee 22001100 22001188 22002255 NNeexxttGGeenn FFAAAA 22001100 NNeexxttGGeenn IImmpplleemmeennttaattiioonn PPllaann FFAAAA NNeexxttGGeenn MMiidd TTeerrmm CCoonncceepptt ooff OOppeerraattiioonnss 4 Definitions (1) (cid:52) Trajectory Operations – is the concept of an air traffic management system in which every aircraft that is operating in or managed by the system is represented by a four-dimensional trajectory (4DT). Every managed aircraft known to the system has a 4DT either provided by the user or derived from a flight plan or type of operation. Trajectory operations, or TOps, represent a mid-term implementation strategy to gain capacity and efficiency. (FAA Starting Definition into RTCA) 5 Definitions (2) (cid:52) Trajectory-based Operations – extends TOps and provides separation, sequencing, merging and spacing of flights based on a combination of their current and future positions. TBO operates gate-to-gate, extending benefits to all phases of flight operations. TBO uses the 4DT to both strategically manage and tactically control surface and airborne operations. Aircraft are handled by their trajectory. (TBO Study Team Definition) 6 Definitions (3) (cid:52) Closed trajectory – the pilot, the FMS, the controller and the automation all have the same closed path Open trajectory when the aircraft is flying at pilots discretion (may be with constraints) or on a controller open clearance e.g. “vector for traffic, turn 20 degrees left” Automation systems may “try” to close trajectories as part of the projection forward – but trajectories are not closed until explicitly closed by instruction or implicitly closed by rejoining 7 Key Mid-Term Concepts (cid:52) All (controlled) aircraft have a 4D trajectory – Uncertainty is higher where ANSP must predict trajectory based only on flight plan – Performance varies by aircraft & system (eg. RNP) Begins with published routes/procedures and ground automation improvements Longer term: – Maintain closed trajectories whenever possible: consistent in aircraft and ANSP, 4D for entire operation – Trajectory can include ‘windows’ with built-in flexibility – Degree of aircraft involvement can vary based on user needs & investment 8 Trajectory Operations (cid:52) Management by Trajectory blends separation and flow Surveillance supports system-aided conformance monitoring, conflict prediction Structure very robust and may be based on dynamic assignment of trajectories Automation provides conflict resolution advisories as trajectory changes –Inclusion of automation in the primary activity increases the percentage of closed trajectories –With data comm – controller preference is for automation supported clearances, closed trajectories become the norm 9 Trajectory Operations - 2 (cid:52) Flow management based on trajectories – Tailored to individual flights • Become trial plans for controllers – Time based metering includes proposed trajectory clearances • Controller reviews, issues and monitors • Limited in the near-term by voice communication limitation Trajectories carried in flight object with flight plan – Trajectory projection includes all known constraints such as TMI’s, SUA etc. 10