当汽车在开行当中时，跟踪设备用三个或四个GPS卫星以三角形定位，然后持续地通过无线电数字传输目标所在的坐标位置。

As the target drives around, the tracking device triangulates its position from three or four GPS satellites, and digitally transmits its coordinates continuously by radio.

youdao

在致导激光仪的协助下，发射器可将带有卫星定位系统且外壳附有环氧黏着剂的迷你跟踪设备投射并牢牢黏附到目标车辆上，这样警方就可以在不危及公众安全的前提下对嫌犯车辆进行追踪。

With the help of a guiding laser, it shoots a satellite-based tracking device, smothered in epoxy goo, onto the target vehicle, allowing the police to track the suspect without endangering the public.

youdao

这家商店还销售全球卫星定位或“全球定位”的系统。商店主人把跟踪装置藏在被盗窃最频繁的那种设备中。

The store also sells global positioning satellite or "GPS" systems. The store owner hid tracking devices in the kinds of equipment which were being stolen most frequently.

youdao