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How to find water vapour density for gaspl

Asked by vaggelis papasot on 14 Nov 2017
Latest activity Edited by Michal Kvasnicka on 14 Nov 2017
I want to use gaspl function. It takes as input arguments distance m, temperature in Celsius, frequency in the interval of [100-1000] GHz, and water vapour density in g/m^3. My question is if i know all the parameters except density how can if find it?

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2 Answers

Answer by Honglei Chen
on 14 Nov 2017

That could be a measurement value you obtain from, say, observatory or historical measurement data? For example, in ITU standard P.676, the example curve is plotted using standard atmosphere, in which the water vapour density is considered as 7.5 g/m^3.
HTH

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Answer by Michal Kvasnicka on 14 Nov 2017
Edited by Michal Kvasnicka on 14 Nov 2017

Just try simple googling with the following keywords: water, wapour, density, table
I hope you smart enough to find something useful.

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