"地美依系统（DME）了解与维护：飞机导航设备的重要性"

Aircraft navigation equipment and maintenance are essential components of ensuring the safety and efficiency of flight operations. In this presentation, we will focus on the Distance Measuring Equipment (DME) system, which is a widely used radio navigation system in civil aviation. The DME system, also known as Distance Measuring Equipment, is a radio distance measuring and navigation system that operates on the principle of interrogating and receiving responses from ground stations. It consists of ground-based transponders and airborne interrogators that work together to provide distance navigation information to aircraft. The ground transponders are strategically located at known geographical positions along air routes or at airports to provide distance response signals to the aircraft's on-board DME equipment. The DME system functions by utilizing an interrogate-and-reply pulse ranging technique to measure the aircraft's distance from the ground station, commonly referred to as slant range. This distance information is crucial for providing accurate navigation guidance to aircraft during flight, both along air routes and within terminal areas of airports. In summary, the DME system plays a vital role in modern civil aviation by providing reliable distance navigation information to aircraft, enhancing the safety and efficiency of flight operations. Understanding the components, functions, and technical aspects of the DME system is essential for ensuring optimal performance and maintenance of aircraft navigation equipment.