目前北斗和gps的卫星系统都能够实现全球覆盖，然而受不同国家政策友好程度的影响，gps在全球的实际覆盖范围要更广。 而且在南北极地区、极地海域等极端环境下，由于南北极散光效应 …

Feb 19, 2021 · So my new truck allows Toyota to read every bit of info from my truck in real time including my GPS location and speed. Now I have already turned off their gracious …

Apr 10, 2019 · Think the GPS companies gives GM and others discount on hardware as long as locked down so they can get some revenue for people to upgrade maps. Be nice if they at …

在 a-gps 系统中，gps 辅助服务器持续监测 gps 卫星，接收 gps 信号，获取导航电文，生成 gps 辅助数据。 GPS 辅助数据发送到蜂窝网络的基站中，并通过蜂窝网络传输到手机，从而使手 …

Nov 22, 2019 · ACC-SAT-TO2 from sonicelectronix and of course it had two XM adapters and no pioneer GPS adapter. Amazon was able to send me the correct wires. The connections for XM …

又下了gps版的， 幸好官网14天包退，话说回来，蜂窝版真的实用吗？ 我算爱运动的，每周有4天是要户外跑6公里以上的，当初买watch也是看中运动这块，想不戴iPhone跑，试用了几次， …

Mar 6, 2009 · I have a 2019 tacoma toyota. And want information on updating the navigation system. Since all the changes in exit numbers, the Nav system is not...

但是蜂窝版和gps版相比也有两个劣势： 劣势1. 耗电量增加导致蜂窝版续航不如gps版，如果蜂窝用的频繁了续航会大幅下降，别说18个小时，甚至13、14个小时都撑不到。 劣势2. 蜂窝版 …

Oct 9, 2024 · I have a 24 Traverse Z71 with similar problems. Purchased in July. A few weeks ago - No Onstar, no gps, WiFi, Supercruise… System test found code U1615. Apparently there is a …

Apr 5, 2008 · Thanks for the info guys. They should make the nav system and On-star totally independent of eachother. I currently have a Magellan GPS Unit, with turn by turn voice …