Process type: Single difference (DGPS)
Observations used: C/A & P code, L1 & L2 carrier phase
Availability: Around the geomagnetic equator
HP satellites: Inmarsat 25E, 98W, 143.5E, AORE, AORW, IOR
LP satellites: Inmarsat POR
Data format: RTCM SC104
Message types: 1, 3, 15 & 16
Typical Type 1 correction update rate: 15 seconds
Typical Type 1 latency: 4 seconds
Typical Type 1 average age of correction: <10 seconds
Typical Type 15 correction update rate: <120 seconds
Normal accuracy: Up to 2000km: 1m (95%)
Ref station co-ordinate frame: ITRF05