Rescuers are using tools such as a microwave radar device developed by NASA's Jet Propulsion Laboratory and the Department of Homeland Security.

救援人员使用了美国宇航局喷气推进实验室和国土安全部开发的微波雷达等工具。

About the size of a car, the satellite uses advanced microwave radar technology to collect detailed height and surface measurements of all bodies of water.

这颗卫星大约有一辆汽车大小，它使用先进的微波雷达技术来收集所有水体的详细高度和表面积测量数据。

The advantage of microwave radar, which allowed the use of parabolic antennas that we see today, fundamentally changed radar from the lower frequencies and all the advantages that going to the higher frequency provided.

微波雷达的优势在于我们能够使用今天所看到的抛物面天线, 从根本上改变了低频率雷达转向更高的频率。