def test_bird():
"""Test Bird/Hulstrom Clearsky Model"""
times = pd.date_range(start='1/1/2015 0:00', end='12/31/2015 23:00',
freq='H')
tz = -7 # test timezone
gmt_tz = pytz.timezone('Etc/GMT%+d' % -(tz))
times = times.tz_localize(gmt_tz) # set timezone
# match test data from BIRD_08_16_2012.xls
latitude = 40.
longitude = -105.
press_mB = 840.
o3_cm = 0.3
h2o_cm = 1.5
aod_500nm = 0.1
aod_380nm = 0.15
b_a = 0.85
alb = 0.2
eot = solarposition.equation_of_time_spencer71(times.dayofyear)
hour_angle = solarposition.hour_angle(times, longitude, eot) - 0.5 * 15.
declination = solarposition.declination_spencer71(times.dayofyear)
zenith = solarposition.solar_zenith_analytical(
np.deg2rad(latitude), np.deg2rad(hour_angle), declination
)
zenith = np.rad2deg(zenith)
airmass = atmosphere.get_relative_airmass(zenith, model='kasten1966')
etr = irradiance.get_extra_radiation(times)
# test Bird with time series data
field_names = ('dni', 'direct_horizontal', 'ghi', 'dhi')
irrads = clearsky.bird(
zenith, airmass, aod_380nm, aod_500nm, h2o_cm, o3_cm, press_mB * 100.,
etr, b_a, alb
)
Eb, Ebh, Gh, Dh = (irrads[_] for _ in field_names)
clearsky_path = os.path.dirname(os.path.abspath(__file__))
pvlib_path = os.path.dirname(clearsky_path)
data_path = os.path.join(pvlib_path, 'data', 'BIRD_08_16_2012.csv')
testdata = pd.read_csv(data_path, usecols=range(1, 26), header=1).dropna()
testdata.index = times[1:48]
assert np.allclose(testdata['DEC'], np.rad2deg(declination[1:48]))
assert np.allclose(testdata['EQT'], eot[1:48], rtol=1e-4)
assert np.allclose(testdata['Hour Angle'], hour_angle[1:48])
assert np.allclose(testdata['Zenith Ang'], zenith[1:48])
dawn = zenith < 88.
dusk = testdata['Zenith Ang'] < 88.
am = pd.Series(np.where(dawn, airmass, 0.), index=times).fillna(0.0)
assert np.allclose(
testdata['Air Mass'].where(dusk, 0.), am[1:48], rtol=1e-3
)
direct_beam = pd.Series(np.where(dawn, Eb, 0.), index=times).fillna(0.)
assert np.allclose(
testdata['Direct Beam'].where(dusk, 0.), direct_beam[1:48], rtol=1e-3
)
direct_horz = pd.Series(np.where(dawn, Ebh, 0.), index=times).fillna(0.)
assert np.allclose(
testdata['Direct Hz'].where(dusk, 0.), direct_horz[1:48], rtol=1e-3
)
global_horz = pd.Series(np.where(dawn, Gh, 0.), index=times).fillna(0.)
assert np.allclose(
testdata['Global Hz'].where(dusk, 0.), global_horz[1:48], rtol=1e-3
)
diffuse_horz = pd.Series(np.where(dawn, Dh, 0.), index=times).fillna(0.)
assert np.allclose(
testdata['Dif Hz'].where(dusk, 0.), diffuse_horz[1:48], rtol=1e-3
)
# test keyword parameters
irrads2 = clearsky.bird(
zenith, airmass, aod_380nm, aod_500nm, h2o_cm, dni_extra=etr
)
Eb2, Ebh2, Gh2, Dh2 = (irrads2[_] for _ in field_names)
clearsky_path = os.path.dirname(os.path.abspath(__file__))
pvlib_path = os.path.dirname(clearsky_path)
data_path = os.path.join(pvlib_path, 'data', 'BIRD_08_16_2012_patm.csv')
testdata2 = pd.read_csv(data_path, usecols=range(1, 26), header=1).dropna()
testdata2.index = times[1:48]
direct_beam2 = pd.Series(np.where(dawn, Eb2, 0.), index=times).fillna(0.)
assert np.allclose(
testdata2['Direct Beam'].where(dusk, 0.), direct_beam2[1:48], rtol=1e-3
)
direct_horz2 = pd.Series(np.where(dawn, Ebh2, 0.), index=times).fillna(0.)
assert np.allclose(
testdata2['Direct Hz'].where(dusk, 0.), direct_horz2[1:48], rtol=1e-3
)
global_horz2 = pd.Series(np.where(dawn, Gh2, 0.), index=times).fillna(0.)
assert np.allclose(
testdata2['Global Hz'].where(dusk, 0.), global_horz2[1:48], rtol=1e-3
)
diffuse_horz2 = pd.Series(np.where(dawn, Dh2, 0.), index=times).fillna(0.)
assert np.allclose(
testdata2['Dif Hz'].where(dusk, 0.), diffuse_horz2[1:48], rtol=1e-3
)
# test scalars just at noon
# XXX: calculations start at 12am so noon is at index = 12
irrads3 = clearsky.bird(
zenith[12], airmass[12], aod_380nm, aod_500nm, h2o_cm, dni_extra=etr[12]
)
Eb3, Ebh3, Gh3, Dh3 = (irrads3[_] for _ in field_names)
# XXX: testdata starts at 1am so noon is at index = 11
np.allclose(
[Eb3, Ebh3, Gh3, Dh3],
testdata2[['Direct Beam', 'Direct Hz', 'Global Hz', 'Dif Hz']].iloc[11],
rtol=1e-3)
return pd.DataFrame({'Eb': Eb, 'Ebh': Ebh, 'Gh': Gh, 'Dh': Dh}, index=times)
def test_bird():
"""Test Bird/Hulstrom Clearsky Model"""
times = pd.date_range(start='1/1/2015 0:00', end='12/31/2015 23:00',
freq='H')
tz = -7 # test timezone
gmt_tz = pytz.timezone('Etc/GMT%+d' % -(tz))
times = times.tz_localize(gmt_tz) # set timezone
# match test data from BIRD_08_16_2012.xls
latitude = 40.
longitude = -105.
press_mB = 840.
o3_cm = 0.3
h2o_cm = 1.5
aod_500nm = 0.1
aod_380nm = 0.15
b_a = 0.85
alb = 0.2
eot = solarposition.equation_of_time_spencer71(times.dayofyear)
hour_angle = solarposition.hour_angle(times, longitude, eot) - 0.5 * 15.
declination = solarposition.declination_spencer71(times.dayofyear)
zenith = solarposition.solar_zenith_analytical(
np.deg2rad(latitude), np.deg2rad(hour_angle), declination
)
zenith = np.rad2deg(zenith)
airmass = atmosphere.get_relative_airmass(zenith, model='kasten1966')
etr = irradiance.get_extra_radiation(times)
# test Bird with time series data
field_names = ('dni', 'direct_horizontal', 'ghi', 'dhi')
irrads = clearsky.bird(
zenith, airmass, aod_380nm, aod_500nm, h2o_cm, o3_cm, press_mB * 100.,
etr, b_a, alb
)
Eb, Ebh, Gh, Dh = (irrads[_] for _ in field_names)
data_path = DATA_DIR / 'BIRD_08_16_2012.csv'
testdata = pd.read_csv(data_path, usecols=range(1, 26), header=1).dropna()
testdata.index = times[1:48]
assert np.allclose(testdata['DEC'], np.rad2deg(declination[1:48]))
assert np.allclose(testdata['EQT'], eot[1:48], rtol=1e-4)
assert np.allclose(testdata['Hour Angle'], hour_angle[1:48])
assert np.allclose(testdata['Zenith Ang'], zenith[1:48])
dawn = zenith < 88.
dusk = testdata['Zenith Ang'] < 88.
am = pd.Series(np.where(dawn, airmass, 0.), index=times).fillna(0.0)
assert np.allclose(
testdata['Air Mass'].where(dusk, 0.), am[1:48], rtol=1e-3
)
direct_beam = pd.Series(np.where(dawn, Eb, 0.), index=times).fillna(0.)
assert np.allclose(
testdata['Direct Beam'].where(dusk, 0.), direct_beam[1:48], rtol=1e-3
)
direct_horz = pd.Series(np.where(dawn, Ebh, 0.), index=times).fillna(0.)
assert np.allclose(
testdata['Direct Hz'].where(dusk, 0.), direct_horz[1:48], rtol=1e-3
)
global_horz = pd.Series(np.where(dawn, Gh, 0.), index=times).fillna(0.)
assert np.allclose(
testdata['Global Hz'].where(dusk, 0.), global_horz[1:48], rtol=1e-3
)
diffuse_horz = pd.Series(np.where(dawn, Dh, 0.), index=times).fillna(0.)
assert np.allclose(
testdata['Dif Hz'].where(dusk, 0.), diffuse_horz[1:48], rtol=1e-3
)
# test keyword parameters
irrads2 = clearsky.bird(
zenith, airmass, aod_380nm, aod_500nm, h2o_cm, dni_extra=etr
)
Eb2, Ebh2, Gh2, Dh2 = (irrads2[_] for _ in field_names)
data_path = DATA_DIR / 'BIRD_08_16_2012_patm.csv'
testdata2 = pd.read_csv(data_path, usecols=range(1, 26), header=1).dropna()
testdata2.index = times[1:48]
direct_beam2 = pd.Series(np.where(dawn, Eb2, 0.), index=times).fillna(0.)
assert np.allclose(
testdata2['Direct Beam'].where(dusk, 0.), direct_beam2[1:48], rtol=1e-3
)
direct_horz2 = pd.Series(np.where(dawn, Ebh2, 0.), index=times).fillna(0.)
assert np.allclose(
testdata2['Direct Hz'].where(dusk, 0.), direct_horz2[1:48], rtol=1e-3
)
global_horz2 = pd.Series(np.where(dawn, Gh2, 0.), index=times).fillna(0.)
assert np.allclose(
testdata2['Global Hz'].where(dusk, 0.), global_horz2[1:48], rtol=1e-3
)
diffuse_horz2 = pd.Series(np.where(dawn, Dh2, 0.), index=times).fillna(0.)
assert np.allclose(
testdata2['Dif Hz'].where(dusk, 0.), diffuse_horz2[1:48], rtol=1e-3
)
# test scalars just at noon
# XXX: calculations start at 12am so noon is at index = 12
irrads3 = clearsky.bird(
zenith[12], airmass[12], aod_380nm, aod_500nm, h2o_cm, dni_extra=etr[12]
)
Eb3, Ebh3, Gh3, Dh3 = (irrads3[_] for _ in field_names)
# XXX: testdata starts at 1am so noon is at index = 11
np.allclose(
[Eb3, Ebh3, Gh3, Dh3],
testdata2[['Direct Beam', 'Direct Hz', 'Global Hz', 'Dif Hz']].iloc[11],
rtol=1e-3)
return pd.DataFrame({'Eb': Eb, 'Ebh': Ebh, 'Gh': Gh, 'Dh': Dh}, index=times)
