Why GNSS Fails Near Buildings (Multipath Explained)

Time sync looks perfect. Your fusion stack is solid.
So why does your position drift, jump, or oscillate near buildings?

It’s not your algorithm—it’s the data.

GNSS signals don’t just arrive directly. They bounce off buildings, trees, and vehicles, creating “multipath” errors that can completely corrupt your solution—especially in urban environments.

Pre-processing is where this gets handled:
• Detecting multipath and NLOS signals
• Filtering noisy measurements before fusion
• Preventing bad data from poisoning your stack

This is the unglamorous layer most teams underestimate—and where a lot of systems quietly fail.

📄 Read the full deep-dive:
https://pointonenav.com/news/pre-processing-and-sensor-strategy-the-work-that-happens-before-fusion/

#GNSS #SensorFusion #Robotics #Autonomy #PhysicalAI

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