Which term describes the reliability of satellite navigation signals used in RNAV?

Which term describes the reliability of satellite navigation signals used in RNAV?

• A. Gnss integrity
• B. Satellite signal accuracy
• C. System availability
• D. Signal latencies

Answer: (A)

Integrity describes the trustworthiness of GNSS data for navigation. It covers the system’s ability to detect faults in satellites, signals, or receivers and to alert users within a defined time if a problem arises, keeping the navigation solution within specified bounds. In RNAV, this reliability is crucial because you rely on continuous, accurate position information to fly procedures safely; integrity provides the confidence that if something is wrong, you’ll be warned and can avoid using faulty data. Accuracy is about how close the measured position is to the true position under normal conditions, not about fault detection. System availability concerns whether the system can provide data at all, not whether that data can be trusted when faults occur. Signal latencies refer to delays in signal processing, not to the reliability or fault-detection capability.

Integrity describes the trustworthiness of GNSS data for navigation. It covers the system’s ability to detect faults in satellites, signals, or receivers and to alert users within a defined time if a problem arises, keeping the navigation solution within specified bounds. In RNAV, this reliability is crucial because you rely on continuous, accurate position information to fly procedures safely; integrity provides the confidence that if something is wrong, you’ll be warned and can avoid using faulty data.

Accuracy is about how close the measured position is to the true position under normal conditions, not about fault detection. System availability concerns whether the system can provide data at all, not whether that data can be trusted when faults occur. Signal latencies refer to delays in signal processing, not to the reliability or fault-detection capability.