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Progress of the APEC GNSS Test Bed Intermodal Expert Group Meeting 27 th APEC Transportation Working Group Meeting Hanoi, Vietnam, 22-25 May 2006. AEROTHAI. 1. Background Information The Asia-Pacific GNSS Test Bed is a part of the APEC GIT working program.
Progress of the APEC GNSS Test Bed Intermodal Expert Group Meeting 27th APEC Transportation Working Group Meeting Hanoi, Vietnam, 22-25 May 2006. AEROTHAI 1
Background Information • The Asia-Pacific GNSS Test Bed is a part of the APEC GIT working program. • USTDA supports a grant of $US675,000 to conduct empirical data collection and an operational test bed. • Strategic Objectives • To evaluate GNSS augmentation capability in the Asia-Pacific region • To collect empirical GNSS data and to analyze Equatorial atmospheric effects on GNSS performance • To allow participating Economies to attain a hand-on working experiences with GNSS equipments • To allow participating Economies to refine and validate GNSS performance over their FIRs • To establish a stage for regional research collaboration for the Asia-Pacific 2
Participating Economies • USTDA Funded: Indonesia, Malaysia, the Philippines, Vietnam and Thailand (Grantee). • Australia and Chinese Taipei have confirmed their participation through self-funding. • Discussion on participation from Hong Kong, China is ongoing. • Additional economies are welcome. 3
Aviation operational levels to be assessed • En-route • Non-Precision Approaches • RNAV • LNAV/VNAV • Baro-VNAV • RNP/RNAV • APV-I • APV-II 5
Aircraft Type and Capability Beech 200 S/N BB-132 Reg. No. HS-DCB Ceiling of 30,000 ft, mechanical pressurized system
Site • Korat (Nakorn Ratchsima) airport (Airport ID:VTUQ) • co-located with TRS and TVS • equipped with ILS, VOR, DME, NDB • reasonably near to aircraft base (Bangkok) with little traffic • flat terrain with no natural obstacle • site of AEROTHAI engineering hub for North Eastern, Thailand Interval and Duration Total of 25-30 flights during 6 months duration Flight test performed during morning, afternoon, and evening
Asia-Pacific GNSS Test Bed • Important Accomplishments • July 2004:Grant agreement signed by AEROTHAI and USTDA at the 4th APEC Transportation Ministerial Meeting • October 2004: Kick-off meeting during APEC GIT 6. • October 2004: A sub-working group was formed during APEC GIT 6. • November 2004: Review of RFP by APEC GIT. • December 2004: Distribution of RFP. • February 2005: Funded host economies selected ITT Industries as the preferred contractor during APEC GIT 7. • May 2005: Contract between AEROTHAI and ITT was signed. • June 2005: Implementation meeting in Bangkok • September 2005: Information papers were presented to APEC TPT 26 and 42nd DCGA Asia-Pacific Regions • October 2005: Contract was approved by USTDA along with Grant Amendment and Contract Amendment • November 2005: Implementation meeting in Seoul, Republic of Korea • February-March 2006: Factory Acceptance Test and Factory Training 8
Asia-Pacific GNSS Test Bed • Upcoming Events • April-May 2006: Shipping of Equipment • May 15th, 2006: Equipment arrived at Host Economies • May-June 16th, 2006: Custom clearing and on-site TRS installation and testing • June 19th – July 7th, 2006: Training in Thailand, Integration testing, Data and Performance Verification • July – December 2006: Data collection and Flight Test • September 2006: Initial Study Result • December 2006: Draft Final Report2006: Study report expected 9
Raw data collected by the APEC GNSS Test bed • L1 and L2 GPS signal and messages • SBAS messages generated by Test Master Station • Trajectory of Flight Test calculated by the TUP 11
Performance Test Goals • General Goal Assess stand-alone and augmented GPS performance with respect to requirements for civil aviation operations • Accuracy and integrity alert limits • En route through approach-with vertical-guidance operations • System Availability and Continuity of Services • Specific Goals • Assess single frequency GPS performance • Assess single frequency GPS + SBAS performance • Assess multiple frequency GPS performance • Assess multiple frequency GPS + SBAS performance • Observe and record ionospheric characteristics in the APEC test bed region.
Test Cases * PDR = Pseudorange; ADR = Accumulated Delta Range (carrier range + ambiguity) ** Optional Cases - Data processing is multi-step and more cumbersome to resolve ADR ambiguities, but illustrative of what will be possible when GPS signals at three frequencies are available.
Thank you for your attention. We will be happy to entertain your questions/comments. 14