The third day of the meeting was the practical teaching day of the image transmission communication equipment, which mainly demonstrated that our UAV image transmission system and Mianyang Civil Air Defense Command Vehicle were used in combination in air and ground. [Air ground linkage, real-time monitoring - emergency communication command solution] was adopted, and the non center co frequency networking technology (that is, all equipment used a frequency, dedicated to the private network) was used to collect on-site images, and the collected audio and video were transmitted to the command vehicle in real time, Turn the remote site into a "close visual" to provide a basis for research and judgment for leaders on the command vehicle, which is conducive to decision-making, command and dispatching.