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SBAS Implementation in the regions of ACAC and ASECNA
Project with Community research funding
Al-Hoceima Demonstration
SIRAJ Final Workshop - Rabat 28th May 2012
Summary of the activities
• Introduction: Why Al-Hoceima?
• RNAV GNSS Procedure design
• Flight Validation Campaign
• Business Case (Egisavia)
• Safety Case (Navya)
• Lessons learned
SIRAJ Final Workshop - Rabat 28th May 2012
Introduction: Why Al-Hoceima?
First intention was to design, validate and operationally implement an APV SBAS procedure in Casablanca AD. However the on-going installation of a new ILS for RWY 17R made us to reconsider the situation:•The APV SBAS procedures in ILS-equipped runways are used only as a back-up
•The advantages of APV SBAS procedures are much more tangible in small and medium airports with no ILS
In particular, Al-Hoceima AD presented the following characteristics:•Small airport with only VOR/DME approaches
•Challenging scenario, with MDH of NPA rounding 2000 ft
•Low traffic figures: chance for traffic growing evident
•Interest of RAM
•Better EGNOS availability
SIRAJ Final Workshop - Rabat 28th May 2012
Procedure design
RNAV GNSS Procedure down to LPV minima
•Today VOR/DME Non-precision Approaches:
Procedure OCA (OCH) (ft) – CAT AVOR/DME RWY17
STD MACG 1030 (1010)MACG =4.0% 760 (740)
VOR RWY17 2110 (2090)
• New RNAV LPV Procedure:
Procedure OCA (OCH) (ft) – CAT A
LPV STD MACG 680 (660)MACG =4.0% 320 (300)
Al-Hoceima
Minima reduction of more than 500 ft
Vertical guidance during the Final
Approach Segment
No depedance on ground navigation
aids
SIRAJ Final Workshop - Rabat 28th May 2012
Flight Validation Campaign
• Flight Validation campaign in Al-Hoceima
SIRAJ Final Workshop - Rabat 28th May 2012
Flight Validation Campaign
• Flight Validation campaign in Al-Hoceima
2.2585 2.259 2.2595 2.26 2.2605 2.261 2.2615 2.262 2.2625 2.263 2.2635
x 105
-2000
-1500
-1000
-500
0
500
1000
1500
2000GNS480 Horizontal Deviation @ App1
time(s)
Dev
H(m
)
AH
OI2
AH
OIF
AH
OF
A
TH
R17
2.2585 2.259 2.2595 2.26 2.2605 2.261 2.2615 2.262 2.2625 2.263 2.2635
x 105
-200
-150
-100
-50
0
50
100
150
200GNS480 Vertical Deviation @ App1
time(s)
Dev
V(m
)
AH
OI2
AH
OIF
AH
OF
A
TH
R17
2.945 2.9455 2.946 2.9465 2.947 2.9475 2.948 2.9485 2.949
x 105
5
10
15
20
25
30
35GNS480 xPL @ App7
time(s)
xPL(
m)
HPL
VPL
Perfect Flyability Excellent EGNOS Performance
Pilots feedback:The Operation was easier…The Accuracy was better… …than VOR based proceduresThe cockpit workload was lighther…
7 approaches:
- Standard LPV approach - Obstacle assessment in FAS segment - 2 Horizontal sensibility check - 3 Missed Approach Obstacle assessment
SIRAJ Final Workshop - Rabat 28th May 2012
Flight Validation Campaign
• Flight Validation Equipment– The system (standalone platform) included a
Septentrio PolaRX2 GPS/SBAS receiver, whilst the data was also recorded by using ARINC output labels of the GNS480.
– In addition, the PILDO in-house flight validation platform has been used for the validation too.
PILDO in-house Flight Validation BENEFITS:
•Reduce Time and Cost To Validate GNSS RNAV Procedures (Including SBAS enhanced procedures)
• PORTABLE and Adaptive solution to any AIRCRAFT• No NEED of 3rd CODING PROVIDERS to codify Procedures • PROVIDE High integrity and Quality ASSURANCE THROUGHT
all the Validation process• Provide Real time Position error estimation• Provide In-flight Validation Health Monitoring• SAVE-Time on In-Flight Decision• Validation of Curved approach Procedure• Post-flight Vision And Processing • Automatic Report Generation
•Provide Support and Guidance to the Pilot (CDI/VDI)
SIRAJ Final Workshop - Rabat 28th May 20128
Lessons learned
Optimised approach routing from various arrival directions
Optimum descent profile Engine-idle descents Improved track keeping Use of more flexible route and procedure
designs
Limited need for ground infrastructure Can be implemented in areas where ILS
cannot be sited for terrain or obstacle reasons
Can provide approaches to more runways without additional infrastructure costs
Increase the usability of many airports
Reduced fuel burn and noise footprints
Reduced environmental impact Reduced Radio Traffic (R/T) Reduced controller and pilot
workload Reduced delays, diversion and
cancellations due to bad weather
Reduced costs
Aircraft Operators
Airports and Air Navigation Service Providers
Leading to:
APV SBAS Advantages: