How to find water vapour density for gaspl
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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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Honglei Chen
am 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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