手机导航为何有时跟不上？（趣科普·你问我答）

Group 1 - The core issue discussed is the temporary loss of GPS signal accuracy when driving on overpasses due to physical obstructions like bridges and buildings, which can interfere with satellite signals [1] - The Beidou system provides stable and precise signals, but complex environments can cause momentary disruptions in signal reception, leading to navigation inaccuracies [1] - When vehicles are on overpasses, the physical structures create "urban canyons" that block direct signals from satellites, resulting in reliance on weaker reflected signals that can mislead the device [1] Group 2 - The article highlights that the Beidou system's high precision can sometimes amplify the fluctuations in positioning data during signal loss, causing further confusion in navigation [1] - It mentions that as ground receiver algorithms improve, the issues related to signal reflection and misjudgment of location will gradually be resolved [1]