Can a GNSS module work indoors?No — satellite signals are too weak to pass roofs/walls. Indoors use LiDAR, visual SLAM, UWB or magnetic markers; GNSS is for open-sky or semi-open environments.
2026/10/08 mei
Why is my position drifting in cities?Tall buildings cause multipath (signal bounces) and block sky view — the "urban canyon." Fix: dual-band (L1+L5) multi-constellation, a better antenna, a
2026/10/08 mei
How accurate is a GNSS module in numbers?Single point ~1.5–5 m; RTK Fixed ~1 cm + 1 ppm; RTK Float ~10–40 cm; PPP after convergence few cm–dm; dual-antenna heading ~0.1°–0.3° at 1 m baseline.
2026/10/08 mei
What is the difference between RTK, PPP and PPK?RTK: real-time corrections from a nearby base/CORS → centimeter in seconds.PPP: global correction products, no local base, slower convergence, decimeter
2026/10/08 mei
Why can't my RTK module get a fixed solution?Most common causes: antenna not sky-view; signal strength below ~35–40 dB-Hz; RTCM messages/mask mismatch with the firmware; base station coordinates w
2026/10/08 mei
What does "Fixed" vs "Float" mean on my module?Fixed = carrier-phase integer ambiguities resolved → true centimeter accuracy. Float = ambiguities not yet fixed → decimeter accuracy
2026/10/08 mei
What is RTK and how does it reach centimeter accuracy?RTK (Real-Time Kinematic) is the technology that turns a GNSS receiver from meter-level to centimeter-level accuracy. Instead of measuring the sat
2026/10/08 mei