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Toulouse Space Show 2012

Philip Church

in association with:

Hans de With (GSA), Ugo Celestino (EC)

Enabling EGNOS benefits

for helicopters

Overview

• Why do helicopter operators want EGNOS?

• How will they be able to use EGNOS?

• When will they be EGNOS ‘enabled’?

Helicopter operations are different to fixed wing

• Rotorcraft instrument flight rules (IFR) operations are

dependent upon weather conditions

• IFR rotorcraft operations can be limited as

• forced to use the navigation and approach procedures and

facilities dedicated to fixed wing aircraft

• therefore often penalized for incompatible flight profiles

• EGNOS provides a wide range of navigation and

approach solutions to improve airport/heliport

accessibility and rotorcraft integration

So what work has been completed for helicopters?

• Focus on GNSS implementations to date has been

mostly fixed wing

MIELEC

EGNOS reception needs to be assured

• Large dataset from HEDGE demonstrated EGNOS

reception on helicopters:

• 485 flights totalling 689 hrs, 15 mins, 44 seconds of flight

• 4,591,662 recorded points of data from 1276.46 hrs flying

Procedures enabled by EGNOS

• SBAS Offshore Approach Procedure

• PinS (SBAS)

• APV (SBAS) LPV

• Low level RNAV routing

SBAS Offshore Approach (SOAP)

Results from the flight trials

Point-in-Space (PinS) SBAS

• Point in Space procedure defined within ICAO Doc 8168

• Can use SBAS or barometric guidance

• Criteria for SBAS design still under development

• SBAS guidance will give reduced vertical minima compared to

barometric system guidance

• PinS overcomes limitations of current infrastructure

• Increases availability in poor weather

• Reduces patient transfer delay for HEMS

• Less constrained by mountainous terrain

APV (SBAS) LPV

• Benefits • Steep approaches

• Improved access in low visibility operations

• Increased availability

• Demonstration • 5.3 NM FAS

• 5.96º GPA (10.4%)

• 464 ft OCH

• Stable descent at 750 ft/min at 70 KIAS

• Small height loss after MAPt

• High gradient achieved after MAPt (>800 ft/min)

Low level RNAV routing

Enabling helicopter operations requires procedures and

equipment

Procedure availability

• As of April 2012, only nine European aerodromes had

instrument approach procedures published with LPV

minima

• PBN implementation will gradually increase the number of LPV

procedures

• Helicopters also stand to benefit once EGNOS enabled

procedures are published to

• Heliports

• Hospitals

• HEMS set down areas

• The push for additional procedures needs to come from

the users

ICAO Code designated Heliports in Europe

ICAO Code designated Heliports in Europe with

notified plans to implement LPV procedures

Currently only two helicopters types currently

certified by EASA to fly LPV procedures

Bell 429

AgustaWestland 109SP

Helicopter type certification challenges

• Availability of avionics

• Different operational

environment

• Current lack of

procedure design

criteria

• Wide variation in

helicopter vertical

performance

• Integration challenges

Operational challenges will still remain

• Controlled airspace /

Uncontrolled airspace

• Air Traffic Control

• Primary means of

navigation

• Aerodrome 4-letter code

assignment

• Acceleration of adoption

• Finalisation of design

criteria

Conclusions

• EGNOS has the potential to provide helicopter

operators with a valuable increase in reliability and

availability

• HEMS operators and patients will especially benefit

• Imminent ICAO criteria will help acceptance of

helicopter SBAS approach procedures

• Imminent publication of EASA AMC 20-28 will help

airworthiness approvals

• Operators need to

• Apply for airworthiness and operational approval

• Work with aerodromes, heliports and hospitals and regulators

• Request the implementation of procedures to support their

operations

www.askhelios.com

Space

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Air Traffic Management

Airports

Rail

Maritime

Thank you for your

attention

Philip Church

philip.church@askhelios.com