Brian O'Connell wrote 

>>  Most instrument measurements are not reliable below freezing, as there
is no way to distinguish between supercooled water (evaporation) and ice
(sublimation) in your wet bulb, <<

FWIW, a low-power 22 GHz absorption spectrometer might be ideal for
measuring the amount of water present near or below freezing temperatures. 



Cortland Richmond
KA5S

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