What Is Waas? - Furuno DUAL GPS GP-150-DUAL Operator's Manual

APPENDEX

What is WAAS?

WAAS, available in North America is a provider in the worldwide SBAS (Satellite Based
Augmentation System) navigation system. CBAS provides GPS signal corrections to SBAS
users, for even better position accuracy, typically better than three meters. There are three more
SBAS providers, MSAS (Multi-Functional Satellite Augmentation System) for Japan, EGNOS
(Euro Geostationary Navigation Overlay Service) for Europe and GAGAN (GPS And GEO
Augmented Navigation) for India. The illustration below shows the coverage area. (Accuracy
may be affected when using a GEO satellite not within your current location.) This manual uses
"WAAS" for these three providers generically.
EGNOS
Provider
WAAS
EGNOS
MSAS
GAGAN
AP-12
GAGAN
Satellite type
Intelsat Galaxy XV
TeleSat Anik F1R
Inmarsat-3-F2/AOR-E
Artemits
Inmarsat-3-F5/IOR-W
MTSAT-1R
MTSAT-2
Inmarsat-4-F1/IOR
WAAS
MSAS
Longitude
133°W
107.3°W
15.5°W
21.5°E
25°E
140°E
145°E
64°E
Satellite No.
135
138
120
124
126
129
137
127