Time synchronization importance in integrated navigation?

• A. Ensures all sensor measurements correspond to the same epoch.
• B. Automatically compensates clock drift between devices.
• C. Prevents time skew between sensors by aligning measurements to a common epoch.
• D. Eliminates need to synchronize sensors.

Answer: (C)

Time synchronization in integrated navigation is about giving every sensor’s data a single, shared time reference so they can be fused accurately. Each sensor has its own clock, so measurements come with timestamps that can drift apart. If you mix data that were captured at different instants, you’re effectively combining information that doesn’t refer to the same moment, which distorts the estimated position, velocity, and attitude.

By aligning all measurements to a common epoch, you ensure they are interpreted at the same time instant. This prevents time skew between sensors and lets the navigation estimator correctly relate each measurement to the system’s state. The remaining clock differences can be handled within the model, but the crucial part is that they’re all anchored to the same time base. It’s not accurate to say you can avoid synchronization altogether; a common time reference is still required.