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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: