Navigation General · Electronic Nav — RAIM
Receiver Autonomous Integrity Monitoring (RAIM) provides:
- AA check that uses redundant satellites to detect and warn of a faulty position solution✓ Correct
- BA backup engine
- CTide predictions
- DAutomatic steering
Explanation
RAIM uses extra (redundant) satellite measurements to cross-check the solution and alert the navigator if a satellite signal is producing an unreliable fix—an integrity safeguard, since GPS alone gives no inherent warning of a bad position.
Authority: Bowditch; GNSS guidance
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