NMEA

Amap Tech

Jul 9, 2021 · Fundamentals

GPS Time Synchronization: Principles, Methods, and Applications in Mapping Vehicles

GPS‑based time synchronization aligns camera, LiDAR, and inertial sensor streams in mapping vehicles by using the satellite‑derived Pulse‑Per‑Second signal and NMEA data to correct the MCU’s clock, handle PPS‑crystal and PPS‑NMEA anomalies, and provide sub‑microsecond timestamps for precise sensor fusion.