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added support for RH to VP conversions. #8

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added support for RH to VP conversions. #8

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3d1cb1e
added support for RH to VP conversions.
ctrl-alton-delete May 25, 2018
7fbb7ca
changed tabs to spaces.
ctrl-alton-delete May 25, 2018
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8 changes: 7 additions & 1 deletion refet/daily.py
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Original file line number Diff line number Diff line change
Expand Up @@ -97,7 +97,7 @@ def __init__(self, tmin, tmax, ea, rs, uz, zw, elev, lat, doy,
continue
elif unit.lower() not in [
'k', 'kelvin', 'f', 'fahrenheit',
'pa',
'pa','rh','relative humidity',
'langleys', 'w m-2', 'w/m2',
'mph',
'ft', 'feet',
Expand All @@ -121,6 +121,12 @@ def __init__(self, tmin, tmax, ea, rs, uz, zw, elev, lat, doy,
elif variable == 'ea':
if unit.lower() in ['pa']:
self.ea /= 1000.0
elif unit.lower() in ['rh','relative humidity']:
if self.ea.max() > 1.0: # check for percentage format
self.ea /= 100
# use Teten's formula
self.ea = self.ea * (0.61078 ** (17.27 * ((self.tmin+self.tmax)/2) / (
((self.tmin+self.tmax)/2) + 237.3)))
elif variable == 'rs':
if unit.lower() in ['langleys']:
self.rs *= 0.041868
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7 changes: 6 additions & 1 deletion refet/hourly.py
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Original file line number Diff line number Diff line change
Expand Up @@ -91,7 +91,7 @@ def __init__(self, tmean, ea, rs, uz, zw, elev, lat, lon, doy, time,
continue
elif unit.lower() not in [
'k', 'kelvin', 'f', 'fahrenheit',
'pa',
'pa','rh','relative humidity',
'langleys', 'w m-2', 'w/m2',
'mph',
'ft', 'feet',
Expand All @@ -109,6 +109,11 @@ def __init__(self, tmean, ea, rs, uz, zw, elev, lat, lon, doy, time,
elif variable == 'ea':
if unit.lower() in ['pa']:
self.ea /= 1000.0
elif unit.lower() in ['rh','relative humidity']:
if self.ea.max() > 1.0: # check for percentage format
self.ea /= 100
# use Teten's formula
self.ea = self.ea * (0.61078 ** (17.27 * self.tmean / (self.tmean + 237.3)))
elif variable == 'rs':
if unit.lower() in ['langleys']:
self.rs *= 0.041868
Expand Down