What
While BeiDou L1/L2 receivers use two frequency bands to fix ionospheric delay and have anti-jamming capabilities, they still face practical limitations. In dense urban corridors, they can take 3-5 seconds to re-acquire signals when switching between BeiDou and GPS constellations, corrupting real-time speed and location data. Additionally, the internal temperature-compensated crystal oscillator (TCXO) can degrade under constant engine heat cycles, causing cumulative position drift of 10-15 meters over a month, making historical route replay unreliable for compliance audits.



















