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EN ATPL Radio Navigation Questions in English
Practise Radio Navigation
A DME station is located 1000' above MSL. An aircraft flying at FL 370 in ISA conditions which is 15 NM away from the DME station, will have a DME reading of:
For a conventional DME groundspeed readout during steady level flight, with slant-range error small and the aircraft well away from overhead passage, which station geometry normally gives the best approximation to groundspeed?
The carrier frequencies used by DME interrogation and reply channels span approximately:
A DME is located at MSL. An aircraft passing vertically above the station at flight level FL 360 will obtain a DME range of approximately:
Under ISA and standard radio-propagation assumptions, an aircraft at FL210 cannot receive a DME 220 NM away whose antenna is near mean sea level. Using the approximate radio-horizon model 1.23√h (h in feet, range in NM), the most likely geometrical reason is that:
In which situation will speed indications on an airborne Distance Measuring Equipment (DME) most closely represent the groundspeed of an aircraft flying at FL400?
For DME/N on an X channel, the measured elapsed time from interrogation to reply is 2,000 microseconds, including a 50-microsecond transponder reply delay. The approximate slant range is:
The two main design functions of Secondary Surveillance Radar (SSR) Mode S are:
In conventional SSR Mode C, the aircraft transponder reports pressure altitude referenced to 1,013.25 hPa in increments of:
Which of the following equipments works on the interrogation/response principle?
