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– GPS Integrity Monitors
– Siting & Installation
•SmartPath Development Continues
– Curved Approach Paths
– Missed Approaches
– Guided Departures
– Positioning Service
– CAT-II, CAT-III Final Approaches
Dave Jensen/John Howard
2
CAAC New Technology Seminar – GBAS 29-30 October 2009
World’s First FAA-Certified GBAS
􀃆 Honeywell.com
SmartPathTM CAT-I GBAS
• Category-I Ground Based Augmentation System (GBAS)
–Compliant with FAA-E-AJW44-2937A (Category-I LGF)
– FAA System Design Approval (SDA) granted September 3, 2009
• Cross-Over to Digital Technology
– GBAS replaces Category-I Instrument Landing System (ILS)
• ILS uses analog radio beam to guide approach
– Aircraft now receives omni-directional digital data broadcast
• GBAS uses ‘virtual’ path to guide approach
• Critical Subsystem Redundant Architecture
– 4 Reference Receivers (minimum 3)
– 2 Corrections Processor Subsystems
– 2 VHF Data Broadcast (VDB) Subsystems
– 2 Communication Busses (Ethernet)
– 3 Power Sources (2 Primary AC + 10h Battery Backup)
Dave Jensen/John Howard
3
CAAC New Technology Seminar – GBAS 29-30 October 2009
World’s First FAA-Certified GBAS
􀃆 Honeywell.com
SmartPathTM Capabilities
• Category-I Precision Approach (200 ft DH)
– 99% availability in most locations
• Approach Paths: Uplinks Final Approach Segments (FAS)
– Supports all runways at an airport with single system
– Provides multiple glide slopes/approaches per runway
– Up to 26 final approaches
– Flexible siting anywhere within 6 km of all Decision Heights
• Integrity: Monitors GPS Satellites, Signal-in-Space, Ground
– Aircraft raw GPS unable to ensure GPS satellite integrity
– Monitoring of satellite, space and ground error sources
– 1.5 x 10-7 approach integrity (to 23 NM)
• Accuracy: Corrects up to 13 pseudoranges
– L1 used for all pseudorange measurements
– 50 cm accuracy (95%)
• Connectivity: Ethernet Interface
– Read-only monitoring via Ethernet interface
– Up to 6 remote GBAS monitors
Dave Jensen/John Howard
4
CAAC New Technology Seminar – GBAS 29-30 October 2009
Provides Approaches, Integrity, Accuracy
􀃆 Honeywell.com
SmartPathTM Components
GPS Antennas Corrections Processor
•Four GPS RRA/RSMU per GBAS
•Multipath limiting design
•Sharp cut-off/rejection at horizon
•Pentium M, 1.8 GHz CPU
•Real time monitoring for GPS
failures, local error sources
•Differential corrections
VHF Antenna
•Horizontal polarized (HPOL)
•Omni-directional
GPS Receivers
•48-channel, L1 C/A GPS
•Signal Quality Monitoring
VHF Radios
•Nav band, 108-118 MHz
Omni g Q y g
•D8PSK modulation, TDMA
•Digital data broadcast
Maintenance Data Terminal Ai T ffi St t U it
•Windows OS
•System mode & control
•Component status
•Approach •Windows OS
•System mode
•Current/Predicted
Air Traffic Status Unit
Dave Jensen/John Howard
5
CAAC New Technology Seminar – GBAS 29-30 October 2009
control
Availability
􀃆 Honeywell.com
SmartPathTM Architecture
Dave Jensen/John Howard
6
CAAC New Technology Seminar – GBAS 29-30 October 2009
Redundant Critical Subsystems
􀃆 Honeywell.com
SmartPathTM Integrity Monitors
• Satellite Errors
– Satellite Position
– Signal Deformation
– Code/Carrier Divergence (CCD)
– Excessive Acceleration
– Low Signal Power
•Space & Atmosphere Errors
– Ionosphere
– Troposphere
• Ground & Receiver Errors
– Multipath
– Radio Frequency Interference
– Cross-Correlation
– Cycle Slip
Dave Jensen/John Howard
7
CAAC New Technology Seminar – GBAS 29-30 October 2009
􀃆 Honeywell.com
SmartPathTM Siting
• Select Possible Locations
–Map & Paper study determines candidate locations
– On-Site assessment evaluates candidate locations
• Assess Airport Siting Constraints
– Airport Operational Requirements
– Safety and Obstruction Zones
– Keep-out Areas, e.g. VOR, ILS
　
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