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[question] What are the averge transmission power of navaids

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[question] What are the averge transmission power of navaids

Postby www2 » Wed Oct 07, 2020 11:51 pm

He all i wand to know what are the average transmitter power for navaids (VOR/NDB/ILS/TCAN/etc)?
I work on a idea to simulate radio base navaids and commulication a better way using transmission power than distance.
And for note if a navaids have multiple Range/transmission Power as VOR Terminal, Low Altitude, High Altitude i like to see the average of each individual average Range/transmission Power.
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Re: [question] What are the averge transmission power of nav

Postby Johan G » Thu Oct 08, 2020 11:04 am

Well, the specifications within ICAO Annex 10, Aeronautical Telecommunications, Volume I - Radio Navigation Aids (November 25, 2016), Chapter 3 - Specifications for radio navigation aids, specifies coverage (as ranges and widths, or as elevation, or as altitude) and as either field strength (in uv/m, microvolts per meter) or energy density (as dBW/m^2, decibel watt per square meter). Hence there are probably a range of common transmission powers, rather than a specific transmission power for each. However, as I would expect navigation aids to typically be placed either on flat terrain or in elevated terrain, there is probably some very common transmission powers.

Edit: Found some data sheets:

ILS [1]
Localizer: Max 20 W (adjustable)
Glideslope: Max 5 W (adjustable)
Marker beacons: Max 2.5 W (adjustable)

VOR [2]
25-100 W in 0.1 W increments

DME [3]
50-106 W (one model)
500-1000 W (another model)

Edit 2: Some minor grammar etc.
____
[1] Leonardo Series 2100 Instrument Landing System (ILS) data sheet (PDF, 190 kB) (archived)
[2] Leonardo Model 1150A VHF Omni-Directional Range (VOR) data sheet (PDF, 1.1 MB) (archived)
[3] Leonardo Model 1118A/1119 Distance Measuring Equipment (DME) data sheet (PDF, 441 kB) (archived)
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Re: [question] What are the averge transmission power of nav

Postby benih » Thu Oct 08, 2020 11:52 am

Also keep in mind that elevation and frequency does play an important role too: with VHF you get a line of sight characteristic which means quick loss of reception in case you get behind the radio horizon.
Last edited by benih on Sun Oct 11, 2020 10:09 am, edited 1 time in total.
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Re: [question] What are the averge transmission power of nav

Postby www2 » Sat Oct 10, 2020 10:22 pm

Thanks Johan G
@benih
I was plan to do that.
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