ADSB NOTIONAL ARCHITECTURE

1
ADS-B NOTIONAL ARCHITECTURE

• OPERATIONAL CONSIDERATIONS/BENEFITS
• ATP-130
• GOMWG/16
• MAY 8-10, 2001

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ASSUMPTIONS

• ADS-B SURVEILLANCE DATA IS CERTIFIED TO A LEVEL
  OF ACCURACY EQUAL TO/GREATER THAN CURRENT EN
  ROUTE RADAR
• THAT DATA IS DELIVERED TO THE CONTROLLER IN A
  FORMAT THAT CAN BE USED FOR CONTROL PURPOSES
• ADS-B EXCLUSIONARY AIRSPACE
• INTERNATIONAL COORDINATION AND REQUIREMENTS
  COMPLETED.SOME COVERAGEOVERLAP WITH ADJACENT FIRS

3
Operational Expectations

• Surveillance will be seamless with existing NAS
  technology
• Use will be seamless to controllers/pilots
• Standards/training/procedures will mirror current
  environment
• Any exclusionary airspace will allow for maximum
  benefit (based on equipage)
• Any exclusionary airspace would be based on
  altitudes, not routes

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BENEFITS OF RADAR-LIKE SURVEILLANCE..OPERATIONAL

• More accurate positional data available to the
  controller
• Allows use of reduced separation standards
• Allows use of random RNAV routes
• Navigational Assistance/Vectors
• Assistance avoiding weather/restricted areas
• Assistance during emergencies/unusual situations
• Allows for more dynamic flow control/ATC response
  to system degradation

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USER BENEFITS, cont.

• MORE EFFICIENT USE OF AIRSPACE
• FASTER RESPONSES TO CLIMB/DESCENT REQUESTS
• MORE DIRECT ROUTINGS (WORKLOAD DEPENDENT)
• MORE ROOM TO PASS!
• MORE CAPACITY PER ALTITUDE/ROUTE
• EASIER TO ACCOMMODATE USER PREFERRED FLIGHT
  TRAJECTORIES
• REAL-TIME MONITORING OF WX DEVS

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USER BENEFITS, contgt

• GAME TRAILS DURING SEVERE WEATHER
• GREATER RETURN ON INVESTMENT IN ADVANCED
  NAVIGATIONAL SYSTEMS
• GREATER ABILITY TO ACCOMMODATE ONBOARD EQUIPMENT
  PROBLEMS
• ADDITIONAL CAPACITY ON CROWDED COASTAL ROUTES
• HIGHER COMFORT LEVEL
• GREATER SAFETY!!!!!

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Current Operational Scenario

• Air Zoldos Flt 1001 .IAH to MIA
• Departs IAH to the west, climbing turn to the
  northeast
• Joins J86, proceeds eastbound
• Over PEKON requests direct MARCI direct
  MIA.UNABLE (no unmon random RNAV
• Over NEPTA, AZ1001, capable of Mach .80 cruise,
  is reduced to Mach .73, spacing behind
  Orlando-bound Citation

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Current Scenario

• AZ1001 is mad, controller is mad, only person
  happy is the dot.com billionaire on the Citation
  taking family to Disney World
• Does get small shortcut over BOXKR to join
  arrival into MIA(actually get to use RNAV)
• Total distance.. 864 miles (always under radar)
• Gate to Gate. 2 hour 6 minutes

9
ADS Scenario

• Air Zoldos 1001 departs IAH, given initial
  heading of 110
• Approximately 20 miles offshore (areas cold)
  controller clears AZ1001 direct Marci then the
  arrival into Miami
• Approximately 140 miles south of Leeville, ZHU
  computer seamlessly switches tracking of AZ1001
  from onshore radar to buoy based ADS-B tracking
  system. by data tag informs controller aircraft
  is now being tracked by ADS based system

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ADS Scenario, cont

• 150 miles west of FL coast AZ1001 assigned best
  forwardsequencing ahead of LAX-MIA MD-11 30
  miles southwest
• Notices small bizjet to the north struggling to
  keep up
• 15 minutes from land, AZ1001 requests 20 deg
  right dev for wx, controller issues 20 deg
  vector to climbing opposite direction traffic,
  then approves AZ1001s dev

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ADS Scenario, cont

• Total distance..812 miles
• Gate to Gate..1 hour 53 minutes
• Saved 52 miles and 13 minutes
• Using profit sharing saved from increased
  efficiency, Captain of AZ1001 takes family to
  DisneyWorld
• Metering delays into ATL drop by 3 minutes due to
  increased room to vector inbounds, result of
  offloading a/c to Gulf

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What Users lose..

• No ADS-B, no fly over high sea (at least at
  certain altitudes/routes
• Where you could deviate before, you cant deviate
  now (without ADS-B)
• Full ability to operate non-dedicated fleet in
  the Gulf area
• Ability to hide from controllers

13
System Gains.

• Additional 2.5 of surveilled airspace in the
  Domestic NAS (lower 48)
• Increased efficiency of operations in the Gulf
• Additional capacity ripples all the way to
  Cleveland Center
• Safer, more orderly operations in the Gulf
• More dynamic, responsive Traffic Mgt

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OFFSHORE

• ADS-B offers interesting alternative for on
  demand IFR services in offshore airspace
• Benefits to operators during IFR conditions may
  be enough to offset limited VFR usage
• Portability of system would solve gap widening
  problem of expanded production areas
• High of aircraft utilize GPS and Datalinkcould
  lower equipage costs

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RADAR vs ADS-B

• RADAR

• ADS-B
• Less Limited
• YES
• NO
• ???
• YES
• ???
• ???

Coverage Accuracy CFactor Cost
Factor Capacity Reliability Availability
Limited Yes Yes No Yes
Yes Yes
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ADS Questions to be answered

• Can we get a 5 mile standard?
• Can we get it in the next 3-5 years?
• Will it be seamless?
• Can it be jammed, pirated, altered easily
• How much ?
• Do we have the footprint?
• Do we have the connectivity we need?