@BeginModule
@NewPage
@Name      = Hi
@Title     = Humidity index (°C)
@Section   = Miscellaneous
@Class     = Arithmetic
@Arguments = ifile1 ifile2 ifile3 ofile
@Operators = hi

@BeginDescription
Let @file{ifile1}, @file{ifile2} and @file{ifile3} be time series
of temperature, vapour pressure and relative humidity records.
Then a corresponding time series of resulting humidity index values
is written to @file{ofile}. The humidity index calculation is only
valid for a temperature of T >= 26Â° C and a relative humidity of
R >= 40 %. Whenever these conditions are not satisfied, a missing
value is written to @{ofile}. Note that the temperature must be given
in degrees Celsius, the vapour pressure must be given in TBD, and the
relative humidity must be given in percent.
@EndDescription
@EndModule


@BeginOperator_hi
@Title     = Humidity index (°C)
@EndOperator
