驻车定位系统根据回波发声器原理工作。
The Parktronic system operates on the echo-sounder principle.
通过使用雷电探测定位系统、卫星云图和雷达回波图像等资料，针对雷电数据进行技术分析。
By use of lightning detection and positioning system, satellite cloud and radar echo images as well as the lightning data are analyzed.
故障定位或DTF模式指示驻波比或回波损耗水平在各点沿电缆长度和天线系统。
Fault location or DTF mode indicates VSWR or Return Loss levels at each point along the cable and antenna system length.
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