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DW International
Bespoke Solutions for Aviation

GNSS RAIM/RNP Prediction Service

RAIM Prediction – Automatic and Direct

The GNSS RAIM/RNP Prediction Service – GRPS – has been developed to meet the demanding requirements of the RNAV community in its efforts to meet PBN guidelines and State requirements. A versatile and flexible service, GRPS has been adopted by many operators, flight planning service providers and ANSPs where it has been seamlessly integrated into their existing systems and operations.

How it Works

GRPS supplies real-time RAIM/RNP predictions direct to end users through their existing flight-planning suites. It is fully automated so that flight planners obtain the RAIM prediction as they plan the route. The service allows flight planners, dispatchers and aircrew to plan around periods of reduced GNSS availability by taking all route details from the flight plan and calculating RAIM availability for all route types – oceanic, en-route, terminal, and approach – on a leg-by-leg basis, including destination and alternate airports for RNAV and RNP operations anywhere in the world.

Future-proof Capabilities

GRPS allows operators to comply with all FAA, European, ICAO and other worldwide RAIM prediction requirements and guidelines. GRPS covers all PBN applications, from RNAV 10 and RNP 4 to RNP AR APCH (down to RNP 0.1). In the future GRPS will provide RAIM predictions for new constellations – Galileo, GLONASS and COMPASS.


A versatile and flexible service, GRPS seamlessly integrates into existing flightplanning suites and operations.