1 / 15

GRAS Phases 1 and 2 Development: Enhancing GNSS Services in Aviation

This document explores the development of the Ground-Based Regional Augmentation System (GRAS), highlighting its benefits in terms of safety, accuracy, efficiency, and environmental savings. It also discusses the contract, technology overview, comparison of systems, current activities, risks, outcomes, and ICAO approval status.

bvoight
Download Presentation

GRAS Phases 1 and 2 Development: Enhancing GNSS Services in Aviation

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. GRAS Phases 1 and 2 Development Keith McPherson Manager GNSS keith.mcpherson@airservicesaustralia.com

  2. ICAO Document “A32-19: Charter on the Rights and Obligations of States Relating to GNSS Services” ………. 2.Every State and aircraft of all States shall have access, on a non-discriminatory basis under uniform conditions, to the use of GNSS services, including regional augmentation systems for aeronautical use within the area of coverage of such systems. ………. 4. Every State providing GNSS services, including signals, or under whose jurisdiction such services are provided, shall ensure the continuity, availability, integrity, accuracy and reliability of such services, including effective arrangements to minimize the operational impact of system malfunctions or failure, and to achieve expeditious service recovery.

  3. Technology Overview NPA 400-600ft GRAS 250ft GBAS 200ft GRAS Transmitters Sydney Airport Regional Airport • Increased safety, accuracy & integrity • More efficient approaches • Reduced infrastructure & real estate • Increased Guided missed approaches • Increased Integrity • Supports ADS-B - accurate surveillance • Assists UPR & UPT • Mixed Mode operation with RNP • Guided Departures • Situational Awareness • Accurate departure tracks • Environmental saving

  4. GRAS Contract • Open tender process used • All tenderers capable of developing GRAS • Honeywell International selected • Contract signed 16 June 2005 for: • Phase 1 (System Design) June 2005-February 2006 (extended 2 months by mutual agreement due holiday season) • Phase 2 (Production) 10 April 2006-December 2008 • Rollout end 2008

  5. G G G G G G G G G G G G G G G G G G G G G G G G G G G G G G G G G G G G G G G G G G G Comparison of Systems

  6. SBAS Geo Satellite Galileo Satellite GPS GLONASS Satellite Satellite SBAS Geo ( Ranging Signal Only) GRAS Master Reference Station Stations VDB Terrestrial Communication Links GRAS – Generic Architecture VDB VDB VDB VDB Similar to SBAS and GBAS VDB

  7. GRAS Coverage Near Airports Flight Level 150 5,000 feet

  8. B A E D C G H F • A mini-cell with lower power transmitter is placed to improve coverage • Similar to a GBAS transmitter where coverage limited, perhaps to 23 nmiles for an approach • H slot is used, but could also reuse A, B, or C slot if multiple mini-cells were needed AugmentedCell Concept

  9. GRAS Status G G G G Preferred Tender Selected Request For Proposals Phase 1 Contract Award (Design) Tenders Closed Phase 2 Contract Start (Develop) Roll-out Request For Expression of Interest G Completed Current Activities Planned Stages Status Oct 2004:11 Companies Registered Nov 2004: 6 Companies Selected Jan 2005: 4 Companies Responded Mar 2005: Honeywell Selected Jun 2005: Within forecasted budget Apr 2006: Honeywell End 2008: Commence Roll-out G

  10. Inputs, Risks, Outcomes Goal - gate to gate precision navigational service for aircraft Outcomes • Approved GBAS Cat-1 • Earlier uptake of GNSS technology • Approved GRAS (APV) • Less CFIT • Synergies (GBAS and GRAS) • Total navigation package in one avionics • ICAO GBAS Cat-1 SARPs • issued • ICAO GRAS SARPs 2006 • ICAO PANSOPS GBAS Cat-1 • Procedures Designs 2004 • RTCA Minimum Operating • Performance Standards • (MOPS) 2006 Inputs Manufacturer • GRAS contract • LAAS Contract FAA • Avionics GBAS/GRAS Regulator • Work with FAA under • Technical Agreement • GRAS & GBAS • certifications • progress together Usable Systems Standards RISKS • Regulatory • Certification • Delegations • Technical • New technology • APEC Test Bed • Manufacturer • Uptake rate • Resources • Financial • Cost • Market • GBAS Support • GRAS Support • Uptake rate • Legal • Contracts • Liabilities

  11. ICAO Approval Status GRAS • Concept presented to ICAO • Air Navigation Commission tasked GNSS Panel to develop GRAS SARPs in 1999 • Australia (Airservices) selected to develop SARPs • Standards and Recommended Practices (SARPs) • November 2000 - Concept of Operations developed • 2001-2002: draft SARPs • 2002-2004: validation process • October 2004: Navigation Systems Panel endorses GRAS SARPs • March 2005: Air Navigation Commission agrees GRAS is complete, issues State Letter seeking comment on GRAS SARPs • November 2005: Air Navigation Commission agrees to GRAS SARPs • 24 February 2006: ICAO Council approves GRAS SARPs • 17 July 2006: Effective Date of GRAS SARPs • 23 November 2006 - Applicability Date of Amendment 81

  12. Status of RTCA GRAS Avionics Minimum Operational Performance Standards (MOPS) RTCA created new Working Group (WG-8) to develop the GRAS MOPS Final draft ready for review by WG-8, October 2006 Validation being completed by avionics manufacturers If cleared, GRAS MOPS will go through RTCA process and final review prior to being issued as a new RTCA document in 2007 FAA has stated it will issue a Technical Standard Order (TSO) for GRAS if there is sufficient manufacturing interest

  13. GRAS - Features • Working prototype installed in Australia fully SARPs compliant • Enroute integrity achieved • Approach integrity achieved - meets Approach with Vertical Guidance Level II • Proven software – based on WAAS and LAAS technology and underlying software • High integrity/high reliability software to be developed to RTCA DO-178B/278 standards • Avionics capable of seamless integration of GRAS and GBAS

  14. Key Benefits of GRAS • Enroute navigation over entire country • Non-Precision Approaches, Approaches with vertical guidance • No single point of failure for whole system • Inexpensive compared to SBAS • Reduce current navigation aids • Flexible tracking/free flight for domestic regional airlines • Curved/offset approaches to a runway • Elimination of step-down approaches • Improved runway utilisation • Robust VHF network for message delivery to aircraft • No additional equipment if GBAS avionics fitted • GRAS only avionics for General Aviation • Does not require CAT I infrastructure on the airport • Signal available for enroute • One frequency across country (reduces spectrum needs)

  15. Thank you In 1928, Australian pilots landed on GRAS

More Related