Bingo! thx. ;) On Thursday, May 3, 2018 at 5:48:00 PM UTC-4, Thomas Keffer wrote: > > Check line 370, file wxservices.py > <https://github.com/weewx/weewx/blob/master/bin/weewx/wxservices.py#L370> > > -tk > > On Thu, May 3, 2018 at 9:59 AM, John Hill <[email protected] > <javascript:>> wrote: > >> Hi Thomas, >> Sorry to rehash an old thread, but I was looking though your >> wxformulas.py for more info on the ET calc. As you mentioned, ET used to >> be calculated as a rate but now is just a measured quantity, like rain. >> However, the calcs and the examples in wxformulas.py still reference a rate. >> >> For example, line 687: >> Returns: Evapotranspiration in mm/hr >> Example (Example 19 in the reference document): >> >>> sr_mean_wpm2 = 680.56 # == 2.45 MJ/m^2/hr >> >>> timestamp = 1475337600 # 1-Oct-2016 at 16:00UTC >> >>> print "ET0 = %.2f mm/hr" % evapotranspiration_Metric(Tmin_C=38, >> Tmax_C=38, rh_min=52, rh_max=52, >> ... sr_mean_wpm2=sr_mean_wpm2, ws_mps=3.3, wind_height_m=2, >> ... latitude_deg=16.217, longitude_deg=-16.25, altitude_m=8, >> timestamp=timestamp) >> ET0 = 0.63 mm/hr >> Another example, this time for night >> >>> sr_mean_wpm2 = 0.0 # night time >> >>> timestamp = 1475294400 # 1-Oct-2016 at 04:00UTC (0300 local) >> >>> print "ET0 = %.2f mm/hr" % evapotranspiration_Metric(Tmin_C=28, >> Tmax_C=28, rh_min=90, rh_max=90, >> ... sr_mean_wpm2=sr_mean_wpm2, ws_mps=3.3, wind_height_m=2, >> ... latitude_deg=16.217, longitude_deg=-16.25, altitude_m=8, >> timestamp=timestamp) >> ET0 = 0.03 mm/hr >> >> -- >> You received this message because you are subscribed to the Google Groups >> "weewx-user" group. >> To unsubscribe from this group and stop receiving emails from it, send an >> email to [email protected] <javascript:>. >> For more options, visit https://groups.google.com/d/optout. >> > >
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