Distance Measuring Equipment

We reckon as one of the superior amongst aircraft distance measuring equipment suppliers located in India. We can bring an eternal gamut of distance measuring equipment and distance measurement equipment that are designed to fulfill the multifarious purpose of diverse industries. Distance Measuring Equipment (DME) : Knowledge of the aircraft’s position is a basic requirement for air navigation and one means of satisfying this requirement is to present the pilot with bearing and distance information. Distance information may be derived from radar or by DME, which is a form of radar. In primary radar a short pulse is transmitted and the time interval from transmission to reception of the reflected pulse is measured. As the speed of an electromagnetic pulse through the atmosphere is 300,000 kilometers per second, or one nautical mile in 6.2 micro-seconds, the distance between the transmitter and the target can be calculated. In the case of radar sited on the ground an aircraft target may be easily identified and the distance measured readily due to its relative freedom from other reflecting objects. If radar is installed in an aircraft, precise identification of specific ground targets, for all practical purposes, is very difficult to effect due to mass reflection from surrounding objects. Hence primary radar is supplemented by additional equipment at the target to enable distance to be reliably measured to the necessary degree of accuracy. When primary radar is supplemented to accomplish this task it then becomes a form of secondary radar. In secondary radar, pulses known as interrogation pulses are transmitted and when received at the target they are passed through a ‘gate’ and then trigger transmission of reply pulses back to the initial source where the time interval may be measured and displayed as distance. The ‘gate’ in the target receiver is an electronic device which is preset to receive only matching pulses. In the DME system the interrogating equipment, known as the ‘Interrogator’, is installed in the aircraft and the target, located on the ground, is referred to as the ‘Transponder’ or ‘Ground Beacon'.