1 / 13

Overview

ASSTAR Airborne Separation Operations in Oceanic Airspace Bob McPike, NATS ASAS-TN2 Conference Glasgow, September 2006. Overview. Background to oceanic operations ASAS operations to improve flight flexibility ASAS operations to manage airspace congestion. Oceanic Communications.

Download Presentation

Overview

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript


  1. ASSTARAirborne Separation Operations in Oceanic Airspace Bob McPike, NATSASAS-TN2 ConferenceGlasgow, September 2006

  2. Overview • Background to oceanic operations • ASAS operations to improve flight flexibility • ASAS operations to manage airspace congestion

  3. Oceanic Communications • No VHF Radio or radar cover over most of the North Atlantic Region (NAT) • Voice communications provided by High Frequency (HF) Radio • HF subject to weather effects • Audibility can be limited • Sometimes communication is impossible • So ATC issues strategic clearances • Issued prior to entering an oceanic Flight Information Region (FIR) • Extend from Oceanic Control Area (OCA) entry to landfall • Long-term conflict prediction used to ensure no separation loss over whole route

  4. 15 mins 10 mins 60 miles 1000 ft Oceanic Separation Standards • Separation standards governed by various uncertainties: • Communication unreliability • Navigational accuracy • Accuracy of forward estimates (driven by weather forecasts) . . . so separation standards are very large

  5. ASAS in Oceanic Airspace • ASAS concepts under consideration by ASSTAR for oceanic airspace • In-Trail Procedure (ATSA-ITP and ASEP-ITP) • In-Trail Follow (ASEP-ITF) • Self-Separation on a Free-Flight Track (SSEP-FFT) • Status • Concepts and procedures defined • Simulations will be conducted in Amsterdam November 2006 to March 2007

  6. > 10 mins > 10 mins FL360 ATSA-ITPCriteria 5 mins FL350 In-Trail Procedure • Aircraft at FL340 would like to climb ….. • But standard longitudinal separation does not exist at level above • Crew request an ITP Climb FL340

  7. ITF 5 mins In-Trail Follow • 5 minutes : No standard longitudinal separation • Airborne Separation Established: In-Trail Follow • Climb Approved, Maintaining In-Trail Airborne Separation • In-Trail Separation maintained over extended period • Second climb approved –Maintaining ITF Separation • In-Trail Follow cancelled • Exit Oceanic Airspace FL360 FL350 FL340

  8. Self-Separation on a Free-Flight Track • Concept still in the early stages of development • FFT is an OTS track reserved for ASAS-capable aircraft • Aircraft on the track can change speed and level at their own discretion . . . but no lateral flexibility allowed • Aircraft requires downstream clearance to re-enter managed airspace

  9. Using ASAS to manage airspace congestion • Oceanic/Domestic Interface - a Plumbing Problem? • Narrow ‘pipes’ in European/North American regions • European pipework highly complex (lots of crossing and converging traffic)

  10. Traffic Concentration 24 May 2006

  11. Traffic Streaming

  12. 15 minutes ITF 4 minutes Tactical re-routes in the NAT

  13. Thank you for listening bob.mcpike@nats.co.uk

More Related