What is the process of ensuring that the receiver works on ground waves?(a) PGTR identification(b) ECD(c) HCG(d) TOPCOI have been asked this question by my school teacher while I was bunking the class.This intriguing question originated from Hyperbolic Radio Systems topic in portion Terrestrial Radio Navigation System of Avionics

What is the process of ensuring that the receiver works on ground wave

1.	What is the process of ensuring that the receiver works on ground waves?(a) PGTR identification(b) ECD(c) HCG(d) TOPCOI have been asked this question by my school teacher while I was bunking the class.This intriguing question originated from Hyperbolic Radio Systems topic in portion Terrestrial Radio Navigation System of Avionics
Answer» Right answer is (a) PGTR identification The best explanation: PGTR or Pulse GROUP time reference identification is the process of ensuring that the RECEIVER is operating on the ground wave of the signal. The basic principle behind it is that ground WAVES travel FASTER than sky WAYS.

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