Enhanced sequencing and merging operations

1
Enhanced sequencing and merging operations

• Objective to redistribute tasks related to
• sequencing (e.g. in-trail) and merging of
• traffic between controllers and flight crews.
• Benefits
• Controller availability by reorganisation
• and streamlining of tasks
• More regular spacing based on actual
• separation minima and thus an increase in
  capacity
• Increased flight crew awareness of traffic and
  anticipation of ATC instructions
• Implementation considerations
• New instructions will require specific functions
  on board aircraft related to HMI and automation
• Only pair-wise equipage required but maximum
  benefits from all equipped

2
Enhanced sequencing and merging operations
spacing instructions
heading then remain
heading then merge
s
WPT
s
s
XYZ456 250 - 41
XYZ456 250 ? 41
XYZ123 235 ? 40
XYZ123 235 ? 40
merge
remain
WPT
s
XYZ123 235 ? 40
s
XYZ123 235 ? 40
XYZ456 250 ? 41
XYZ456 250 ? 41
3
Enhanced sequencing and merging operations
heading then merge

• Pilot
• Identifies targetXYZ456, target 1234
  identified, 8 oclock, 30 miles
• Resumes when spacing obtained then, adjusts speed
  to maintain spacing

• Controller
• Designates target XYZ456, select target 1234
• Gives initial heading, waypoint and desired
  spacingXYZ456, heading 270 then behind target
  merge INKAK 8 miles behind
• Navigation
• Target direct INKAK (no turning point)
• Ownship on heading then direct INKAK (not on
  target trail)
• Air-air surveillance
• Target position and speed (no intent required)

4
Heading then merge instruction ground air views
5
Enhanced sequencing and merging CoSpace
experiments

• Overall
• Four measured sectors
• Dense and generic airspace (Paris South-East
  arrivals)
• All traffic equipped
• Use of spacing instructions at controllers
  discretion
• Independent variables
• Level of traffic (high, very high)
• Sector configuration (converging point)
• Use of airborne spacing (with, without)

6
CoSpace - Spatial mapping of instructions
Very high trafficWith airborne spacing
Very high trafficWithout airborne spacing
7
In-trail procedure in oceanic airspace

• Objective to allow in-trail ADS-B equipped
  aircraft in non-radar oceanic airspace, which may
  not be longitudinally separated from each other,
  to climb or descend through each others flight
  levels.
• Benefits
• Improved utilisation of the North Atlantic
• oceanic airspace by facilitating a higher
• rate of flight level changes yielding better
• flight efficiency (e.g. fuel savings,
• avoiding turbulent flight levels)
• Implementation considerations
• Safety studies needed to determine spacing value

8
In-trail procedure in oceanic airspace
9
Enhanced crossing and passing operations

• Objective to provide controller with new set of
  instructions to solve conflicts e.g. directing
  flight crews to cross or pass designated traffic
  aircraft while maintaining a given spacing value.
• Benefits
• Increased controller availability through
• reorganisation and streamlining of tasks
• Increased flight crew awareness of traffic
• and anticipation of ATC instructions
• Implementation considerations
• New instructions will require specific
• functions on board aircraft related to
• HMI and automation
• Only pair-wise equipage required but
• maximum benefits from all equipped

10
Enhanced crossing and passing instructions
11
Package II (2012-2020)

• Enhanced ground surveillance / airborne
  surveillance applications from package I
• e.g. Package I applications that prove too
  complex
• ADS-B as a sole means of surveillance in high
  density airspace
• Airborne separation applications (i.e. Principles
  for the use of ASAS (PO-ASAS) category III
  applications)
• Airborne self-separation applications
• (i.e. PO-ASAS category IV applications)
• in low-density airspace

12
Package III (gt2020)

• Enhanced ground surveillance / airborne
  surveillance applications from previous packages
• Airborne self-separation applications (i.e.
  PO-ASAS category IV applications) in
• medium/high-density
• airspace

13
High traffic density route network and ASAS?
Example research idea 3D route structure based
on layers of parallel tracks at 45
Average route length 5 longer than direct
Europe?