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Radio and satellite navigation  



what is radio navigation?????

The radio navigation system is a method used to determine the position of a person or object relative position on earth by using the radio frequencies(104 to 1011 or 1012 Hz) waves..
how does they work????

the navigation using radio waves by a method known as "electric beacon".

what is electric beacons???????
well a electric beacon means a kind of beacon which helps to fin or pin point our location or bearing(position)...

the beacon transmits a continuous radio signal from a known station ..with a specific radio frequencies.Occasionally the beacon function is combined with some other transmission, like telemetry data or meteorological information. 

the radio frequencies works at AM, VHF , UHF frequencies. the radio navigation systems usually used in ILS (instrumental landing system).

hence these electric beacon works in three types:

DISTANCE        : ordinary bearings like in the compass(n,s,e,w)
PHASE SHIFT  : using "Doppler shift" https://en.wikipedia.org/wiki/Doppler_effect
DIRECTIONS   : by measuring travel times of waves



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