现代社会已经进入信息时代,而电磁波是一种信息容量巨大的载体,且光速传输,充满宇宙,无时不在,无处不在。因此,无论是民事应用领域还是军事应用领域,对信息的传输与获取、控制与利用都极大地依赖电磁频谱。因而,掌握所在地区的信道占用度及频谱分布就是得十分重要。 Modern society has entered the information age, and electromagnetic wave is a huge carrier of information capacity, and the speed of light transmission, full of the universe, all the time, everywhere. Therefore, whether it is for civil applications or military applications, the transmission and acquisition, control and utilization of information rely heavily on the electromagnetic spectrum. Therefore, it is very important to master the channel occupancy and spectrum distribution in your area.