网络雷达是一种无线信号接收卡，能自动搜索周围一定范围内的无线网络，然后破解对方安全密码，强行共享他人网络。其信号搜索半径大约是3600米。
上面的雷达影像在两天前，由位于美国加利福尼亚金石的深空网络雷达望远镜拍摄的。
The above radar image was taken two days ago by the Deep Space Network radio telescope in Goldstone, California, USA.
此外，传感器技术和计算机网络方面的进步意味着这个系统在中欧地区将不需要大型雷达。
Moreover, improvements in sensor technology and computer networks mean that the system would not need a large radar in central Europe.
167个天气雷达站点的NEXRAD网络是所有的国家气象预报的基础。
The NEXRAD network of 167 weather radar sites is the foundation of all national weather forecasting.
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