federal aviation administration gps augmentation systems status leo eldredge, gnss group federal...
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Federal AviationAdministration
GPS Augmentation Systems Status
Leo Eldredge, GNSS GroupFederal Aviation Administration (FAA)September 2009
CGSIC2Federal Aviation
AdministrationSeptember 2009
FAA GPS Augmentation Programs
CGSIC3Federal Aviation
AdministrationSeptember 2009
WAAS Architecture
38 Reference
Stations
3 Master
Stations
4 Ground
Earth Stations
2 Geostationary
Satellite Links
2 Operational
Control Centers
CGSIC4Federal Aviation
AdministrationSeptember 2009
IntelsatGXV133W
TelesatF1R
107W
Inmarsat 4F3 98W
GEO Satellite Coverage Plot
Localizer Performance Vertical (LPV)
Global SBAS Coverage
CGSIC7Federal Aviation
AdministrationSeptember 2009
Airports with WAAS Supported Instrument Approaches with Vertical Guidance
As of Aug 27th, 2009-1,822 LPVs serving 970 Airports- 1049 LPVs to non ILS Runways - LPVs to 678 non-ILS Airports - 773 LPVs to ILS runways
WAAS Enterprise Schedule04 05 06 07 08 09 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30FY
Development Operational
Technical Refresh Operational
JRC
Launch10/05
Operational
Operational
Launch9/05
Technical Refresh Operational
JRC
FOC
Launch09/08
Operational
Launch09/14
Operational
Launch09/16
Operational
Launch09/18
Operational
FLP Segment (Phase II)
LPV-200 Segment (Phase III)
Dual Frequency (Phase IV)
GEO #3 – Intelsat
GEO #4 – TeleSat Gap
Filler GEO
GEO #5 – TBD
GEO #6 – TBD
GEO #7 - TBD
Initial TestProduction
FOC
SLEP
Phase III Phase IVCutover
Operational SLEP
Standards Development User Transition Period
L5 Design L5 Implementation
GPS L5
WAAS
WAAS Avionics
Ph
as
es
GE
OG
PS
M
od
ern
iza
tio
nA
pp
roa
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De
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nt
WAAS Procedure Development
~5,218
CGSIC9Federal Aviation
AdministrationSeptember 2009
Local Area Augmentation System (LAAS)
• Precision Approach For CAT- I, II, III
• Multiple Runway Coverage At An Airport
• 3D RNP Procedures (RTA), CDAs
• Navigation for Closely Spaced Parallels
• Super Density Operations
CGSIC10Federal Aviation
AdministrationSeptember 2009
GBAS Pathway Forward
• Cat-I System Design Approval at Memphis – Complete• Cat-III Validation by - 2010• Cat-III Final Investment Decision by - 2012
CGSIC11Federal Aviation
AdministrationSeptember 2009
Agana, Guam
Frankfurt, Germany
Rio De Janeiro, Brazil
Malaga, Spain
LAAS/GBAS International Efforts
Sydney, Australia
Bremen, Germany
CGSIC12Federal Aviation
AdministrationSeptember 200912
Future Considerations
GLONASS
GPS
Galileo (EU)
COMPASS
CGSIC13Federal Aviation
AdministrationSeptember 200913
Two Civil Frequencies
• The ionosphere creates the largest source of uncertainty affecting today’s use of GPS for aviation
• When GPS L5 becomes widely available it will be possible for the user receivers to directly remove the ionosphere delay errors
• However, the two frequency combination amplifies the effects of other error sources– More satellites tend to reduce the magnitude of the
errors
CGSIC14Federal Aviation
AdministrationSeptember 2009
WAAS Dual Frequency User Potential(No “RDM Constraint”)
38 US WRS13 SA WRSIFOR Threshold
38 US WRSIFOR Threshold
Current International Signal Plans
151560 1570 1580 1590 1600 16101170 1180 1190 1200 1210 1220 1230 1240 1250 1260 1270 1280 1290 1300 Frequency (MHz)
1560 1570 1580 1590 1600 16101170 1180 1190 1200 1210 1220 1230 1240 1250 1260 1270 1280 1290 1300 Frequency (MHz)
FutureCDMA signal
1560 1570 1580 1590 1600 16101170 1180 1190 1200 1210 1220 1230 1240 1250 1260 1270 1280 1290 1300 Frequency (MHz)
1560 1570 1580 1590 1600 16101170 1180 1190 1200 1210 1220 1230 1240 1250 1260 1270 1280 1290 1300 Frequency (MHz)
1560 1570 1580 1590 1600 16101170 1180 1190 1200 1210 1220 1230 1240 1250 1260 1270 1280 1290 1300 Frequency (MHz)
1560 1570 1580 1590 1600 16101170 1180 1190 1200 1210 1220 1230 1240 1250 1260 1270 1280 1290 1300 Frequency (MHz)
1560 1570 1580 1590 1600 16101170 1180 1190 1200 1210 1220 1230 1240 1250 1260 1270 1280 1290 1300 Frequency (MHz)
SBAS(US Europe
India Japan)
QZSS(Japan)
IRNSS(India)
COMPASS(China)
Galileo(Europe)
GLONASS(Russia)
GPS(US)
L1L5 L2
Compass & IRNSSIn S-band
1560 1570 1580 1590 1600 16101170 1180 1190 1200 1210 1220 1230 1240 1250 1260 1270 1280 1290 1300 Frequency (MHz)
CGSIC16Federal Aviation
AdministrationSeptember 2009
ARAIM Results for 30 SVs & URA = .5 m
For VAL = 35m, NDP & Acc: 97.77% coverage at 99.5% availability< 50% > 50% > 75% > 85% > 90% > 95% > 99% >99.5% >99.9%
Longitude (deg)
Latit
ude
(deg
)
URA = 0.5m, Bias = 0.5m, URE = 0.25m, rBias = 0.1m
-150 -100 -50 0 50 100 150
-80
-60
-40
-20
0
20
40
60
80
99.5% VPL - 20.46 m avg., 35m avail = 99.99%< 15 < 20 < 25 < 30 < 35 < 40 < 45 < 50 > 50
Longitude (deg)
Latit
ude
(deg
)
URA = 0.5m, Bias = 0.5m
-150 -100 -50 0 50 100 150
-80
-60
-40
-20
0
20
40
60
80
ARAIM currently predicated upon a user update rate of ~ 1hour
CGSIC17Federal Aviation
AdministrationSeptember 2009
Summary
• WAAS currently providing service to aviation in the U.S. National Airspace System
• LAAS system design approval for Category-I completing in September
• LAAS activity to continue to Category-II/III • Dual Frequency GNSS Offers Significant Potential
for Aviation