Core Viewpoint - The navigation signal anomaly in Nanjing on December 17, 2025, was caused by temporary interference with GNSS satellite signals, not by a network signal interruption, highlighting the limitations of offline maps in resolving such issues [1][2]. Technical Analysis - Offline maps only store geographic data and cannot replace the source of positioning signals, which rely on GNSS satellite signals from at least four satellites [2] - The interference specifically targeted the civilian frequency bands of Beidou and GPS, preventing the reception of positioning signals, leading to issues like position drift and lack of data feedback even with offline maps [2] - Offline maps are more suitable for areas with satellite positioning signals but without communication network signals, such as oceans or remote mountains [2] Strategic Significance of Beidou and GPS Compatibility - The simultaneous impact on both Beidou and GPS signals during the anomaly validates the strategic foresight of China's Beidou system in planning its civilian frequency bands [3] - The international satellite navigation spectrum follows a "first come, first served" rule, with GPS having occupied core L-band resources early on, leaving limited quality spectrum for Beidou [3] - The compatibility of Beidou's civilian signal (B1C band) with GPS's civilian signal (L1C band) breaks the spectrum resource blockade and creates a strategic balance, where interference with Beidou also affects GPS applications [3] Military Frequency Resilience - The signal anomaly only affected civilian GNSS frequency bands, while Beidou's military frequencies remained unaffected [4] - Beidou employs a military-civilian frequency separation design, with military frequencies being exclusive and physically isolated from civilian bands [4] - The military system incorporates advanced anti-jamming technologies, ensuring strong resilience against interference and deception, providing stable and reliable time-space services for national defense and emergency response [4] Industry Response - The Nanjing Satellite Application Industry Association will continue to monitor industry dynamics and share professional knowledge on satellite navigation technology to enhance public understanding [5] - The association aims to facilitate communication between enterprises and the government, encouraging participation from relevant companies without membership fees [5]

百度地图客服表示，已记录该情况反馈给相关工作人员。记者同时将情况反馈至高德地图app， 反馈显示"您上报的问题已经告诉定位工程师。" 据江苏新闻消息，12月17日傍晚，有南京网友反映，多个常用导航软件系统突发异常。导航界 面持续显示"行驶在无数据道路上"。 外卖骑手也纷纷反映外卖软件等内置导航出现问题。"看不见导航"或导致外卖配送延时。 无独有偶，部分共享单车同样出现定位错误。某南京网友表示自己使用一辆共享单车短短五六分 钟，停车时却"显示超出运营范围""死活关不了锁"。强制关锁后，订单终点定位在了57公里之 外的地方。 18日，记者咨询了多个平台，平台均表示如果因定位造成订单异常，可以向平台进行申诉。美 团回应，如果骑手因为导航产生超时等问题，也可以申诉解决。 另据潇湘晨报，18日，记者就此事致电南京12345便民服务热线，接线人员表示将立刻去核实 该情况，会有职能部门进行回复，截至发稿记者未获回复。 违法和不良信息举报电话：0755-83514034 邮箱：bwb@stcn.com 券中社 × 券商中国 券 中 社 扫码下载券中社APP 扫码关注券商中国公众号 quanshangcn qzs.stcn.c ...