# Example 2.3 - path including dry air, at default mixing ratio
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? Usage: am example2.3.amc [RH%] 
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f 0 GHz  2500 GHz  50 MHz
T0 77 K

layer
P 1013.25 mbar
T 20 C
h 1 m
column dry_air vmr
column h2o RH %1