Receiver Autonomous Integrity Monitoring (RAIM)

RAIM firmware provides receiver autonomous integrity monitoring for broadcast GNSS signals. RAIM employs Fault Detection and Exclusion (FDE) which uses redundant pseudorange measurements to detect and exclude faulty signals that may cause positioning instability. The position solution is recomputed to ensure continuous operation in the presence of a GNSS failure.


  • Based On RTCA DO-229D (2006)
  • Uses redundant pseudorange measurements to detect and exclude faulty signals
  • User alerts when RAIM is not available


  • Improved position solution when individual satellites experience pseudorange
  • Improved GNSS system integrity

Enhance Positioning Solution

When satellites experience pseudorange measurement errors that typically cause significant positioning error, RAIM can be used to enhance the positioning solution. The RAIM algorithm is able to detect the pseudorange anomaly and eliminate it from the position solution. The receiver is then able to recalculate the position with the bad pseudorange removed and produce a position with far less error.

Customized Performance

While used primarily for aviation navigation systems requiring signal and position integrity during various stages of flight, RAIM parameters can be customized to meet the requirements of a range of applications requiring continuous operational confirmation.