1. GAGAN is a Reality Today
Let us Use It

2. SATNAV is the Future
MSAS
Operational SBAS 2

3. World wide SBAS Systems
GAGAN System Commissioned on 14th February 2014 and is the 4th SBAS operational in the world
9/22/2018

4. Why Augmentation?
Current GPS and GLONASS Constellations Cannot Support Requirements For All Phases of Flight
Integrity is Not Guaranteed
Not all satellites are monitored at all times
Time-to-alarm is from minutes to hours
No indication of quality of service Augmentation
Accuracy is Not Sufficient
Vertical accuracy > 10 m
Availability and Continuity Must Meet Requirements
9/22/2018

5. DATA Communication Network - 1
INRES #
DATA Communication Network - 1
Data Communication Network - 2
PRN 128
PRN 127
INLUS-1
1SG 1RF
INLUS-2
INLUS-3
INMCC - 1
INMCC - 2
Bangalore
GAGAN Configuration
GEO In-orbit Spare
GPS Const.
Backup to INLUS 1/2
Delhi

6. GAGAN
GAGAN GEO Footprint
GSAT-8
GSAT-10

7. Advantage GAGAN - Accuracy
Position Error 20 m (99%)
Without GAGAN
GAGAN reduces
Satellite orbit error
Satellite clock error
Ionospheric delay error
With GAGAN
Position Error
5 m (99%)
9/22/2018

8. Advantage GAGAN - Integrity
Without GAGAN
Outliers
No error bound
GAGAN removes outliers
GAGAN guarantees error bounds
GAGAN provides integrity limits
Most important for Aviation
With GAGAN
9/22/2018

9. Horizontal Position Accuracy
Horizontal Protection Limit
GPS Only: 9.0m (99%)
GPS-GAGAN: 3.2m (99%)
RNP 0.1: 185m
APV 1.5: 40m
9/22/2018

10. Vertical Position Accuracy Vertical Protection Limit
RNP 0.1: N/A
APV 1.5: 50m
GPS Only: 17.0m (99%)
GPS-GAGAN: 4.9m (99%)
9/22/2018

11. What GAGAN Offers

12. GAGAN Services 8.7.2014 Certified RNP 0.1 Service over Indian FIR
APV 1 Service over Indian Landmass, service expected to be certified by end of 2014

13. GAGAN Application
GAGAN Signals provide standard GAGAN Messages, which can be decoded by SBAS enabled receiver ONLY
GAGAN improves the reliability, accuracy and availability compared to GPS-only solution
High dynamics users could use GPS safely and confidently ONLY IF GAGAN declares it healthy and un-corrupted.
GAGAN Application in various fields are the by-products of the navigation information available from GAGAN
GAGAN is accessible, through
COTS product
Specifically developed Application ( hardware + software)
9/22/2018

14. GAGAN: Benefits in Civil Aviation
Primary Means of Navigation - Take-Off, En Route, Approach and Landing
More Direct Routes - Not Restricted By Location of Ground-Based Equipment
Precision Approach Capability - At Any Qualified Airport
Reduced fuel consumption, Co2 emission, noise levels
Reduced/Simplified Equipment On Board Aircraft
Increased Capacity - Reduced Separation Due to Improved Accuracy
Increase safety by using 3D approach operations
9/22/2018

15. GAGAN implementation plans
For Runways equipped with ILS:
GAGAN approaches will provide an alternate to ILS, when ILS becomes unserviceable or under maintenance.
At runways not equipped with ILS or at terrain constrained airports where ILS installation is not practicable, GAGAN approaches will provide the requisite vertical guidance.
At small airports where only few aircraft movement exist.
At new airports where traffic density is expected to be less than 10 movements.
9/22/2018

16. Helicopter Navigation using GAGAN
Offshore
Rough terrain operations
Emergency medical services
Search and Rescue
GAGAN Advantage
No dependency upon ground navigation infrastructure at heliport
No more VFR operations
Reduction in Decision Height
Helipads accessibility under poor weather conditions
Solution through
COTS products from leading SBAS enabled receiver manufactures
9/22/2018

17. Avionics Equipage
First Air’s entire fleet of B ’s, B-727’s and ATR’s has UNS-1Fw dual equipage (TSO-C-145B)
Horizon Air, Inc., a US regional air carrier, has certified SBAS in a Bombardier Q-400. The plan is for the installation of WAAS avionics in their Q-400 fleet.
Airbus Industries announced their plans to install satellite landing systems (SLS) in the Airbus 350 XWB
Several general aviation and commercial aircraft come pre-fitted with SBAS receivers.
Exhaustive list of SBAS receiver manufacturers can be found at

18. Helicopters with SBAS Capability in Europe
Source : Helios Report

19. On-board SBAS Receiver equipage Share in Europe
Source : Helios Report

20. EGNOS HEDGE Project
HEDGE (Helicopters Deploy GNSS in Europe) project with an objective to
Develop the helicopter SBAS Offshore Approach Procedure.
Develop helicopter Point In Space (PINS) procedures for mountain rescue and Helicopter Emergency Medical Services.
Demonstrate fixed wing EGNOS based Approaches with Vertical Guidance
Demonstrate an integrated navigation/surveillance concept
Successful demonstration
Mountain rescue approach
Oil rig approach
Emergency medical service approach
Navigation / surveillance concept demonstration
Onboard data was recorded and analyzed to determine
if there were any issues with EGNOS performance
for helicopter operations. 

21. HEDGE NEXT
 Implementing EGNOS specific procedures for helicopters across Europe.
Helicopter low level IFR procedures are being developed in Spain and Poland, demonstrating the benefits to access hospitals in critical conditions.
Implementation of Rotorcraft LPV Procedures
Development of new navigation concepts
Guidance between oil rig platforms
Curved approaches and departure procedures with SBAS

22. EGNOS GIANT Project GNSS Introduction In the AviatioN sector
Phase 1: Introduction of EGNOS as a complementary means to existing operations (En-route: BRNAV, TMA: P-RNAV & Approach operations: RNAV SIDs&STARs).
Phase 2: Approval for new operations: The introduction of APV approach operations using GNSS (EGNOS) vertical guidance to enhance safety and accessibility
Phase 3: Combined use of Galileo/GPS, reinforced by regional integrity systems (EGNOS). In addition to that, the most stringent precision landing requirements (CAT II-III) would be met by means of local components, such as the Ground Based Augmentation Systems (GBAS).

23. Purpose of the User Meet
Helicopter operator bring out their expectation and equipage requirement.
Airports Authority of India
Work in close cooperation with Helicopter operators
Look into feasibility of making procedures for helicopters, at the places as desired by helicopter operator.
Conduct trial runs for performance Analysis
Helicopter operators to come forward for required data collection
DGCA
Provides approval for flight procedures
Advise on certification requirements.

24. EGNOS experience
The message was given by Mieszko Syski from LPR, a Polish Helicopter Emergency and Medical services operator. “Our priority is safety for the client and the pilot: to be safe back home when after take-off the weather doesn’t allow performing the mission. And this is when EGNOS comes into the picture. You can fly safely also at night!”. He added that efficiency is a must for the company and EGNOS allows extending operational capabilities of medical transport with no on-ground equipment costs.

25. EGNOS experience Avionics manufacturers have already chosen EGNOS
Speaking in the workshop, Trevor Pegrum from Garmin said that EGNOS is a key element of the present avionics and of his company’s view of the future flight management system. He recognized that helicopter operations have unique requirements and have optimized the features of their recognized EGNOS GTN touch screen avionics for rotorcraft operations.
He explained that not only navigation can benefit from SBAS (Satellite based augmentation systems), since it is also an enabler of surveillance applications, terrain awareness and warning systems and will improve traffic management

26. REQUEST
Please provide response to questionnaire.

27. Thank You

28. Back up slides

29. Block IIA
Block IIR
Block IIR(M)
Block IIF
GPS III
6 operational
12 operational
7 operational
Now in production
Coarse Acquisition (C/A) code on L1 frequency for civil users
Precise P(Y) code on L1 & L2 frequencies for military users
7.5-year design lifespan
Launched in
C/A code on L1
P(Y) code on L1 & L2
On-board clock monitoring
Launched in
View Air Force fact sheet
All legacy signals
2nd civil signal on L2 (L2C) Learn more
New military M code signals for enhanced jam resistance
Flexible power levels for military signals
Launched in
All Block IIR(M) signals
3rd civil signal on L5 frequency (L5) Learn more
Advanced atomic clocks
Improved accuracy, signal strength, and quality
12-year design lifespan
Launched since 2010