2-1 System Development Certification & Implementation (J ... Implementation W… · Working Group....
Transcript of 2-1 System Development Certification & Implementation (J ... Implementation W… · Working Group....
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GBAS/SBAS IMPLEMENTATION CHALLENGESSystem Development Certification and Implementation Jorge Woods – CASA ‐ Australia 1
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INTRODUCTION
focus = CHALLENGES
layouto GENERAL CHALLENGES
o GBAS
o SBAS
o RELATED NAV/SUR
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GENERAL CHALLENGES
GAIN SUPPORT FROM PAYING USERS
SYNCHRONISED ACTION OF STAKEHOLDERS
OVERCOMING UNFAMILIARITY w/TECHNOLOGY
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GBAS – Background
2000s = Company developing first‐of‐type GBAS
FAA starts certification of such GBAS
FAA team structured around two broad areas:
oCompliance with the relevant standards.
oNovel technical risk.
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GBAS – Addressing the challenges (1)
Priorities Reorganized
o Australian airline = strong supporter
o Airservices = ANSP = strong interest
o CASA supports
Most effective/efficient
o Small Regulatory Team observes FAA certification
o Small Professional Team leads implementation
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GBAS – Addressing the challenges (2)
Activities beyond FAA system certification o Local ionospheric studyo TIFP Design and Validationo Airline Staff Training, Airline Operational Approval o ANSP Staff Training, ANSP Operational Approvalo General Industry Education and Communication
Result = Regulator, ANSP and Users cooperated along journey to ‘commissioning’
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SBAS – Background (1)
SBAS expected to:
o Enhance vertical positioning of aircraft
o Reduce Risk of Controlled Flight Into Terrain (CFIT)
o Benefit regional airports that may never be equipped with Instrument Landing System (ILS)
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SBAS – Background (2)
SBAS Expected to:
o Mitigate against ILS outages
o Improve ability to land in a greater range of conditions particularly where cloud cover is low or visibility compromised
o Reduce delays, diversions, and cancellations with benefits to aircraft operation costs and passenger time lost
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SBAS – Addressing the challenges (1)
SBAS will service sectors other than aviation
Aviation will not be the main user
Government decides to acquire a SBASo Geoscience Australia = lead o Airservices Australia = ANSPo CASA = Safety Regulatoro Program Executive Board + Technical Leadership and
Assurance Groups9| GBAS/SBAS Implementation Challenges – Australia ‐ System Dev. Cert. & Imp
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SBAS – Addressing the challenges (2)
PRN and service name = reserved
SBAS Test Bed to verify:
o availability, accuracy, integrity and coverage
o compatibility of SBAS signals with current generation avionics in operational context.
o safety/efficiency benefits of SBAS instrument approach procedures
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SBAS – Addressing the challenges (3)
SBAS Test Bed Challenges:
o Suitably equipped aircraft
o TIFP designed
o TIFP Design Organisation
o Fly on VMC
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SBAS – Addressing the challenges (4)
CASA Approval Process:
o CASA will observe process from the beginning
o Safety Cases to be presented progressively
o Safety Cases => solid results; traceable application of tailored Systems Engineering Process (SEP)
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SBAS – Addressing the challenges (5)
CASA Approval Process (ctd):
o Systems Engineering Process (SEP):• tailored to maturity of final product/service
• starting with top level performance needs
• cradle to grave, fully integrating, stakeholders, criteria, disciplines, etc.
• as advised by ICAO Global ATM Operational Concept Annex F (Doc 9854)
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SBAS – Addressing the challenges (6)
Activities expected beyond ‘system’ certification (similar to GBAS):
o TIFP Design and Validationo Airline Staff Training, Airline Operational Approval o ANSP Staff Training, ANSP Operational Approvalo General Industry Education and Communication
Expected Result = Regulator, ANSP and Users cooperate along journey to ‘commissioning’
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RELATED NAV/SUR (1)
GNSS/ADS‐B Mandate Challenges
o Note: This is not an SBAS mandate.
o See below
Navigation Rationalization Project: o industry support
o joint action,
o overcoming unfamiliarity
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RELATED NAV/SUR (1)
Backup Navaid Network (BNN) Challenges:
o forecast evolution of overall navigation system o weaknesses to back‐up against o most/effective backup
PBN Challenges:
o Not be a mere overlay of the past
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WRAP UP
GENERAL CHALLENGES
o GAIN SUPPORT FROM PAYING USERS
o SYNCHRONISED ACTION OF STAKEHOLDERS
o OVERCOMING UNFAMILIARITY w/TECHNOLOGY
o CONSIDER GBAS/SBAS WITHIN BROADER ATM/CNS SYSTEM
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END
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SPARE SLIDES
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SBAS – Test Bed Characteristics (1)
SBAS Test Bed:
o began transmitting an RTCA/DO‐229D‐compliant L1 SBAS signal on the 1 June 2017,
o uses Message Type 0 (MT0) instead of MT2 for fast corrections to prevent users engaged in Safety‐of‐Life (SoL) operations from using the service.
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SBAS – Test Bed Characteristics (2)
SBAS Test Bed:
o uses PRN 122 (temporary allocation ended in 31 Jan 2019, subsequently extended to 31 Jan 2020)
o SBAS Service Provider ID (SPID) of 8, the first spare SPID in Appendix B, Section 3.5.4.4.1 of Annex 10.
o MT27 is used instead of MT28.
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SBAS – Test Bed Characteristics (3)
SBAS Test Bed (ctd)
o began transmitting Dual Frequency MultiConstellation (DFMC) L5 SBAS based on the draftICD v1.4 developed by the SBAS InteroperabilityWorking Group.
o The DFMC service makes use of all availableGalileo E1 and E5a signals, and GPS L1 rangingsignals.
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SBAS – Test Bed Characteristics (4)
SBAS Test Bed (ctd)
o due to the low number of L5‐capable satellitesdeployed in the GPS constellation, the testbedrelies on a L1/L2 codeless method to perform theionosphere‐free solution.
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SBAS – Test Bed Characteristics (5)
SBAS Test Bed (ctd)
o clock and ephemerides corrections are broadcaston L5.
o transmits Precise Point Positioning (PPP)corrections on L1 and L5 for non‐aviationapplications using a proprietary format developedby GMV.
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