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Radio beacons: Difference between revisions
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:and 108.10; 108.15; 108.30; 108.35; 108.50; 108.55 would be ILS stations. | :and 108.10; 108.15; 108.30; 108.35; 108.50; 108.55 would be ILS stations. | ||
A VOR station is most often also used for communication (ATC) with the airfield. ATIS, ground, tower etc. | A VOR station is most often also used for communication (ATC) with the airfield. ATIS, ground, tower etc. <tt>The omnidirectional signal is transmitted on a [http://en.wikipedia.org/wiki/Modulated_continuous_wave modulated continues wave] containing the identifying Morse code. The signal contains a [http://en.wikipedia.org/wiki/Amplitude_modulation AM] signal that can be used for voice or ATC. The signal is [http://en.wikipedia.org/wiki/Frequency_modulation FM] modulated and the lag (delay) between the AM and FM signal identifies the radial.</tt> | ||
The omnidirectional signal is transmitted on a [http://en.wikipedia.org/wiki/Modulated_continuous_wave modulated continues wave] containing the identifying Morse code. The signal contains a [http://en.wikipedia.org/wiki/Amplitude_modulation AM] signal that can be used for voice or ATC. The signal is [http://en.wikipedia.org/wiki/Frequency_modulation FM] modulated and the lag (delay) between the AM and FM signal identifies the radial. | |||
Typically the transmitted radial is oriented to True North. | Typically the transmitted radial is oriented to True North. | ||
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There has to be a clear line-of-sight with the beacon. If there are mountains or other obstructions the VOR signal can not be received. | There has to be a clear line-of-sight with the beacon. If there are mountains or other obstructions the VOR signal can not be received. | ||
While it is more expensive to operate a VOR station compared with a NDB the benefits are obvious. The signal is less hindered by unwanted reflections and other interferences, it takes away confusion about North, since it's oriented | While it is more expensive to operate a VOR station compared with a NDB the benefits are obvious. The signal is less hindered by unwanted reflections and other interferences, when the signal is received it is accurate, it takes away confusion about North, since it's oriented True North, it can be used for automated flight and the receivers are more reliable. | ||
==VOR-DME== | ==VOR-DME== | ||
[[File:Pictogram_VOR-DME.png|frame|VOR-DME symbol]] | [[File:Pictogram_VOR-DME.png|frame|VOR-DME symbol]] | ||