tracker device

基本解释

After estimation of PRI, the PRI tracker(also called wheel tracker) is designed based on Complex Programmable Logic Device(CPLD).
在PRI参数估计之后，设计了基于可编程逻辑器件（CPLD）的PRI 跟踪器（或称为飞轮跟踪器）。
The star tracker is the primary part of airborne celestial navigation device. Random vibration is an important invalidation factor of the star tracker.
星体跟踪器是机载天文导航设备的重要组成部分，随机振动是其结构失效的重要因素。
However, if that same user hits that page from a different laptop, it's counted because the Software Usage Tracker tool considers both device- and user-based data.
但是，如果同一用户点击该页面从一个不同的便携式计算机，它的计数因为软件使用情况跟踪工具认为这两个设备和基于用户的数据。

Companies like Withings, which offer an API that syncs with FitBit, just announced a competitive device called the Smart Activity Tracker.
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However, at this point they may not need a tracker: one agent who retrieved the device took the time to list off his favorite restaurants and even congratulated him on his new job.
ENGADGET: American student finds GPS tracker stuck to car, FBI shows up to reclaim its 'federal property'