What technology increased the accuracy and capability of UAS beyond INS?

What technology increased the accuracy and capability of UAS beyond INS?

• A. Inertial Navigation System
• B. Global Positioning System
• C. Loran-C
• D. Radio Altimeter

Answer: (B)

Global Positioning System provides precise, global position and velocity data that complements the inertial navigation system. An INS alone drifts over time because of sensor biases, so accuracy degrades during longer flights. GPS updates correct this drift by providing external position fixes, and when fused with INS in a navigation system, yields much higher accuracy and reliability for flight control, guidance, and mission execution. Other options either don’t provide horizontal position globally (Loran-C is older and less accurate) or measure altitude rather than position (radio altimeter), so they don’t increase navigation accuracy beyond the INS. Thus GPS is the technology that increases accuracy and capability beyond the INS.

Global Positioning System provides precise, global position and velocity data that complements the inertial navigation system. An INS alone drifts over time because of sensor biases, so accuracy degrades during longer flights. GPS updates correct this drift by providing external position fixes, and when fused with INS in a navigation system, yields much higher accuracy and reliability for flight control, guidance, and mission execution. Other options either don’t provide horizontal position globally (Loran-C is older and less accurate) or measure altitude rather than position (radio altimeter), so they don’t increase navigation accuracy beyond the INS. Thus GPS is the technology that increases accuracy and capability beyond the INS.