RADAR stands for "RAdio Detection And Ranging" and descriped equipment that determines the presence, direction, and distance of objects by using reflected electromagnetic energy.
Principles of Radar……続きを見る
Everything You Need to Know About Unmanned Aerial Vehicles and How They Will Affect Your Life!
Drones have been around for a very long time, they are found in the airspace in the USA and other place……続きを見る
