def test_analytical_azimuth():
times = pd.DatetimeIndex(start="1/1/2015 0:00", end="12/31/2015 23:00",
freq="H").tz_localize('Etc/GMT+8')
lat, lon = 37.8, -122.25
lat_rad = np.deg2rad(lat)
output = solarposition.spa_python(times, lat, lon, 100)
solar_azimuth = np.deg2rad(output['azimuth']) # spa
solar_zenith = np.deg2rad(output['zenith'])
# spencer
eot = solarposition.equation_of_time_spencer71(times.dayofyear)
hour_angle = np.deg2rad(solarposition.hour_angle(times, lon, eot))
decl = solarposition.declination_spencer71(times.dayofyear)
zenith = solarposition.solar_zenith_analytical(lat_rad, hour_angle, decl)
azimuth_1 = solarposition.solar_azimuth_analytical(lat_rad, hour_angle,
decl, zenith)
# pvcdrom and cooper
eot = solarposition.equation_of_time_pvcdrom(times.dayofyear)
hour_angle = np.deg2rad(solarposition.hour_angle(times, lon, eot))
decl = solarposition.declination_cooper69(times.dayofyear)
zenith = solarposition.solar_zenith_analytical(lat_rad, hour_angle, decl)
azimuth_2 = solarposition.solar_azimuth_analytical(lat_rad, hour_angle,
decl, zenith)
idx = np.where(solar_zenith < np.pi/2)
assert np.allclose(azimuth_1[idx], solar_azimuth.as_matrix()[idx],
atol=0.01)
assert np.allclose(azimuth_2[idx], solar_azimuth.as_matrix()[idx],
atol=0.017)
def test_analytical_azimuth():
times = pd.DatetimeIndex(start="1/1/2015 0:00", end="12/31/2015 23:00",
freq="H").tz_localize('Etc/GMT+8')
lat, lon = 37.8, -122.25
lat_rad = np.deg2rad(lat)
output = solarposition.spa_python(times, lat, lon, 100)
solar_azimuth = np.deg2rad(output['azimuth']) # spa
solar_zenith = np.deg2rad(output['zenith'])
# spencer
eot = solarposition.equation_of_time_spencer71(times.dayofyear)
hour_angle = np.deg2rad(solarposition.hour_angle(times, lon, eot))
decl = solarposition.declination_spencer71(times.dayofyear)
zenith = solarposition.solar_zenith_analytical(lat_rad, hour_angle, decl)
azimuth_1 = solarposition.solar_azimuth_analytical(lat_rad, hour_angle,
decl, zenith)
# pvcdrom and cooper
eot = solarposition.equation_of_time_pvcdrom(times.dayofyear)
hour_angle = np.deg2rad(solarposition.hour_angle(times, lon, eot))
decl = solarposition.declination_cooper69(times.dayofyear)
zenith = solarposition.solar_zenith_analytical(lat_rad, hour_angle, decl)
azimuth_2 = solarposition.solar_azimuth_analytical(lat_rad, hour_angle,
decl, zenith)
idx = np.where(solar_zenith < np.pi/2)
assert np.allclose(azimuth_1[idx], solar_azimuth.as_matrix()[idx],
atol=0.01)
assert np.allclose(azimuth_2[idx], solar_azimuth.as_matrix()[idx],
atol=0.017)
def time_sun_rise_set_transit_geometric_full_comparison(self, ndays):
dayofyear = self.times_daily.dayofyear
declination = solarposition.declination_spencer71(dayofyear)
equation_of_time = solarposition.equation_of_time_spencer71(dayofyear)
solarposition.sun_rise_set_transit_geometric(
self.times_daily, self.lat, self.lon, declination,
equation_of_time)
def test_equation_of_time():
times = pd.DatetimeIndex(start="1/1/2015 0:00", end="12/31/2015 23:00",
freq="H")
output = solarposition.spa_python(times, 37.8, -122.25, 100)
eot = output['equation_of_time']
eot_rng = eot.max() - eot.min() # range of values, around 30 minutes
eot_1 = solarposition.equation_of_time_spencer71(times.dayofyear)
eot_2 = solarposition.equation_of_time_pvcdrom(times.dayofyear)
assert np.allclose(eot_1 / eot_rng, eot / eot_rng, atol=0.3) # spencer
assert np.allclose(eot_2 / eot_rng, eot / eot_rng, atol=0.4) # pvcdrom
def test_equation_of_time():
times = pd.DatetimeIndex(start="1/1/2015 0:00", end="12/31/2015 23:00",
freq="H")
output = solarposition.spa_python(times, 37.8, -122.25, 100)
eot = output['equation_of_time']
eot_rng = eot.max() - eot.min() # range of values, around 30 minutes
eot_1 = solarposition.equation_of_time_spencer71(times.dayofyear)
eot_2 = solarposition.equation_of_time_pvcdrom(times.dayofyear)
assert np.allclose(eot_1 / eot_rng, eot / eot_rng, atol=0.3) # spencer
assert np.allclose(eot_2 / eot_rng, eot / eot_rng, atol=0.4) # pvcdrom
def test_analytical_azimuth():
times = pd.DatetimeIndex(start="1/1/2015 0:00", end="12/31/2015 23:00",
freq="H").tz_localize('Etc/GMT+8')
lat, lon = 37.8, -122.25
lat_rad = np.deg2rad(lat)
output = solarposition.spa_python(times, lat, lon, 100)
solar_azimuth = np.deg2rad(output['azimuth']) # spa
solar_zenith = np.deg2rad(output['zenith'])
# spencer
eot = solarposition.equation_of_time_spencer71(times.dayofyear)
hour_angle = np.deg2rad(solarposition.hour_angle(times, lon, eot))
decl = solarposition.declination_spencer71(times.dayofyear)
zenith = solarposition.solar_zenith_analytical(lat_rad, hour_angle, decl)
azimuth_1 = solarposition.solar_azimuth_analytical(lat_rad, hour_angle,
decl, zenith)
# pvcdrom and cooper
eot = solarposition.equation_of_time_pvcdrom(times.dayofyear)
hour_angle = np.deg2rad(solarposition.hour_angle(times, lon, eot))
decl = solarposition.declination_cooper69(times.dayofyear)
zenith = solarposition.solar_zenith_analytical(lat_rad, hour_angle, decl)
azimuth_2 = solarposition.solar_azimuth_analytical(lat_rad, hour_angle,
decl, zenith)
idx = np.where(solar_zenith < np.pi/2)
assert np.allclose(azimuth_1[idx], solar_azimuth.as_matrix()[idx],
atol=0.01)
assert np.allclose(azimuth_2[idx], solar_azimuth.as_matrix()[idx],
atol=0.017)
# test for NaN values at boundary conditions (PR #431)
test_angles = np.radians(np.array(
[[ 0., -180., -20.],
[ 0., 0., -5.],
[ 0., 0., 0.],
[ 0., 0., 15.],
[ 0., 180., 20.],
[ 30., 0., -20.],
[ 30., 0., -5.],
[ 30., 0., 0.],
[ 30., 180., 5.],
[ 30., 0., 10.],
[ -30., 0., -20.],
[ -30., 0., -15.],
[ -30., 0., 0.],
[ -30., -180., 5.],
[ -30., 180., 10.]]))
zeniths = solarposition.solar_zenith_analytical(*test_angles.T)
azimuths = solarposition.solar_azimuth_analytical(*test_angles.T, zenith=zeniths)
assert not np.isnan(azimuths).any()
def test_analytical_azimuth():
times = pd.DatetimeIndex(start="1/1/2015 0:00", end="12/31/2015 23:00",
freq="H").tz_localize('Etc/GMT+8')
lat, lon = 37.8, -122.25
lat_rad = np.deg2rad(lat)
output = solarposition.spa_python(times, lat, lon, 100)
solar_azimuth = np.deg2rad(output['azimuth']) # spa
solar_zenith = np.deg2rad(output['zenith'])
# spencer
eot = solarposition.equation_of_time_spencer71(times.dayofyear)
hour_angle = np.deg2rad(solarposition.hour_angle(times, lon, eot))
decl = solarposition.declination_spencer71(times.dayofyear)
zenith = solarposition.solar_zenith_analytical(lat_rad, hour_angle, decl)
azimuth_1 = solarposition.solar_azimuth_analytical(lat_rad, hour_angle,
decl, zenith)
# pvcdrom and cooper
eot = solarposition.equation_of_time_pvcdrom(times.dayofyear)
hour_angle = np.deg2rad(solarposition.hour_angle(times, lon, eot))
decl = solarposition.declination_cooper69(times.dayofyear)
zenith = solarposition.solar_zenith_analytical(lat_rad, hour_angle, decl)
azimuth_2 = solarposition.solar_azimuth_analytical(lat_rad, hour_angle,
decl, zenith)
idx = np.where(solar_zenith < np.pi/2)
assert np.allclose(azimuth_1[idx], solar_azimuth.values[idx], atol=0.01)
assert np.allclose(azimuth_2[idx], solar_azimuth.values[idx], atol=0.017)
# test for NaN values at boundary conditions (PR #431)
test_angles = np.radians(np.array(
[[ 0., -180., -20.],
[ 0., 0., -5.],
[ 0., 0., 0.],
[ 0., 0., 15.],
[ 0., 180., 20.],
[ 30., 0., -20.],
[ 30., 0., -5.],
[ 30., 0., 0.],
[ 30., 180., 5.],
[ 30., 0., 10.],
[ -30., 0., -20.],
[ -30., 0., -15.],
[ -30., 0., 0.],
[ -30., -180., 5.],
[ -30., 180., 10.]]))
zeniths = solarposition.solar_zenith_analytical(*test_angles.T)
azimuths = solarposition.solar_azimuth_analytical(*test_angles.T,
zenith=zeniths)
assert not np.isnan(azimuths).any()
def test_sun_rise_set_transit_geometric(expected_rise_set_spa, golden_mst):
"""Test geometric calculations for sunrise, sunset, and transit times"""
times = expected_rise_set_spa.index
latitude = golden_mst.latitude
longitude = golden_mst.longitude
eot = solarposition.equation_of_time_spencer71(times.dayofyear) # minutes
decl = solarposition.declination_spencer71(times.dayofyear) # radians
sr, ss, st = solarposition.sun_rise_set_transit_geometric(
times,
latitude=latitude,
longitude=longitude,
declination=decl,
equation_of_time=eot)
# sunrise: 2015-01-02 07:26:39.763224487, 2015-08-02 05:04:35.688533801
# sunset: 2015-01-02 16:41:29.951096777, 2015-08-02 19:09:46.597355085
# transit: 2015-01-02 12:04:04.857160632, 2015-08-02 12:07:11.142944443
test_sunrise = solarposition._times_to_hours_after_local_midnight(sr)
test_sunset = solarposition._times_to_hours_after_local_midnight(ss)
test_transit = solarposition._times_to_hours_after_local_midnight(st)
# convert expected SPA sunrise, sunset, transit to local datetime indices
expected_sunrise = pd.DatetimeIndex(expected_rise_set_spa.sunrise.values,
tz='UTC').tz_convert(golden_mst.tz)
expected_sunset = pd.DatetimeIndex(expected_rise_set_spa.sunset.values,
tz='UTC').tz_convert(golden_mst.tz)
expected_transit = pd.DatetimeIndex(expected_rise_set_spa.transit.values,
tz='UTC').tz_convert(golden_mst.tz)
# convert expected times to hours since midnight as arrays of floats
expected_sunrise = solarposition._times_to_hours_after_local_midnight(
expected_sunrise)
expected_sunset = solarposition._times_to_hours_after_local_midnight(
expected_sunset)
expected_transit = solarposition._times_to_hours_after_local_midnight(
expected_transit)
# geometric time has about 4-6 minute error compared to SPA sunset/sunrise
expected_sunrise_error = np.array(
[0.07910089555555544, 0.06908014805555496]) # 4.8[min], 4.2[min]
expected_sunset_error = np.array(
[-0.1036246955555562, -0.06983406805555603]) # -6.2[min], -4.2[min]
expected_transit_error = np.array(
[-0.011150788888889096, 0.0036508177777765383]) # -40[sec], 13.3[sec]
assert np.allclose(test_sunrise,
expected_sunrise,
atol=np.abs(expected_sunrise_error).max())
assert np.allclose(test_sunset,
expected_sunset,
atol=np.abs(expected_sunset_error).max())
assert np.allclose(test_transit,
expected_transit,
atol=np.abs(expected_transit_error).max())
def test_get_sun_rise_set_transit(golden):
times = pd.DatetimeIndex(['2015-01-01 07:00:00', '2015-01-01 23:00:00'],
tz='MST')
result = golden.get_sun_rise_set_transit(times, method='pyephem')
assert all(result.columns == ['sunrise', 'sunset', 'transit'])
result = golden.get_sun_rise_set_transit(times, method='spa')
assert all(result.columns == ['sunrise', 'sunset', 'transit'])
dayofyear = 1
declination = declination_spencer71(dayofyear)
eot = equation_of_time_spencer71(dayofyear)
result = golden.get_sun_rise_set_transit(times, method='geometric',
declination=declination,
equation_of_time=eot)
assert all(result.columns == ['sunrise', 'sunset', 'transit'])
def test_get_sun_rise_set_transit(golden):
times = pd.DatetimeIndex(['2015-01-01 07:00:00', '2015-01-01 23:00:00'],
tz='MST')
result = golden.get_sun_rise_set_transit(times, method='pyephem')
assert all(result.columns == ['sunrise', 'sunset', 'transit'])
result = golden.get_sun_rise_set_transit(times, method='spa')
assert all(result.columns == ['sunrise', 'sunset', 'transit'])
dayofyear = 1
declination = declination_spencer71(dayofyear)
eot = equation_of_time_spencer71(dayofyear)
result = golden.get_sun_rise_set_transit(times, method='geometric',
declination=declination,
equation_of_time=eot)
assert all(result.columns == ['sunrise', 'sunset', 'transit'])
def test_sun_rise_set_transit_geometric(expected_rise_set_spa, golden_mst):
"""Test geometric calculations for sunrise, sunset, and transit times"""
times = expected_rise_set_spa.index
latitude = golden_mst.latitude
longitude = golden_mst.longitude
eot = solarposition.equation_of_time_spencer71(times.dayofyear) # minutes
decl = solarposition.declination_spencer71(times.dayofyear) # radians
sr, ss, st = solarposition.sun_rise_set_transit_geometric(
times, latitude=latitude, longitude=longitude, declination=decl,
equation_of_time=eot)
# sunrise: 2015-01-02 07:26:39.763224487, 2015-08-02 05:04:35.688533801
# sunset: 2015-01-02 16:41:29.951096777, 2015-08-02 19:09:46.597355085
# transit: 2015-01-02 12:04:04.857160632, 2015-08-02 12:07:11.142944443
test_sunrise = solarposition._times_to_hours_after_local_midnight(sr)
test_sunset = solarposition._times_to_hours_after_local_midnight(ss)
test_transit = solarposition._times_to_hours_after_local_midnight(st)
# convert expected SPA sunrise, sunset, transit to local datetime indices
expected_sunrise = pd.DatetimeIndex(expected_rise_set_spa.sunrise.values,
tz='UTC').tz_convert(golden_mst.tz)
expected_sunset = pd.DatetimeIndex(expected_rise_set_spa.sunset.values,
tz='UTC').tz_convert(golden_mst.tz)
expected_transit = pd.DatetimeIndex(expected_rise_set_spa.transit.values,
tz='UTC').tz_convert(golden_mst.tz)
# convert expected times to hours since midnight as arrays of floats
expected_sunrise = solarposition._times_to_hours_after_local_midnight(
expected_sunrise)
expected_sunset = solarposition._times_to_hours_after_local_midnight(
expected_sunset)
expected_transit = solarposition._times_to_hours_after_local_midnight(
expected_transit)
# geometric time has about 4-6 minute error compared to SPA sunset/sunrise
expected_sunrise_error = np.array(
[0.07910089555555544, 0.06908014805555496]) # 4.8[min], 4.2[min]
expected_sunset_error = np.array(
[-0.1036246955555562, -0.06983406805555603]) # -6.2[min], -4.2[min]
expected_transit_error = np.array(
[-0.011150788888889096, 0.0036508177777765383]) # -40[sec], 13.3[sec]
assert np.allclose(test_sunrise, expected_sunrise,
atol=np.abs(expected_sunrise_error).max())
assert np.allclose(test_sunset, expected_sunset,
atol=np.abs(expected_sunset_error).max())
assert np.allclose(test_transit, expected_transit,
atol=np.abs(expected_transit_error).max())
def test_analytical_zenith():
times = pd.date_range(start="1/1/2015 0:00", end="12/31/2015 23:00",
freq="H").tz_localize('Etc/GMT+8')
lat, lon = 37.8, -122.25
lat_rad = np.deg2rad(lat)
output = solarposition.spa_python(times, lat, lon, 100)
solar_zenith = np.deg2rad(output['zenith']) # spa
# spencer
eot = solarposition.equation_of_time_spencer71(times.dayofyear)
hour_angle = np.deg2rad(solarposition.hour_angle(times, lon, eot))
decl = solarposition.declination_spencer71(times.dayofyear)
zenith_1 = solarposition.solar_zenith_analytical(lat_rad, hour_angle, decl)
# pvcdrom and cooper
eot = solarposition.equation_of_time_pvcdrom(times.dayofyear)
hour_angle = np.deg2rad(solarposition.hour_angle(times, lon, eot))
decl = solarposition.declination_cooper69(times.dayofyear)
zenith_2 = solarposition.solar_zenith_analytical(lat_rad, hour_angle, decl)
assert np.allclose(zenith_1, solar_zenith, atol=0.015)
assert np.allclose(zenith_2, solar_zenith, atol=0.025)
def test_analytical_zenith():
times = pd.date_range(start="1/1/2015 0:00",
end="12/31/2015 23:00",
freq="H").tz_localize('Etc/GMT+8')
lat, lon = 37.8, -122.25
lat_rad = np.deg2rad(lat)
output = solarposition.spa_python(times, lat, lon, 100)
solar_zenith = np.deg2rad(output['zenith']) # spa
# spencer
eot = solarposition.equation_of_time_spencer71(times.dayofyear)
hour_angle = np.deg2rad(solarposition.hour_angle(times, lon, eot))
decl = solarposition.declination_spencer71(times.dayofyear)
zenith_1 = solarposition.solar_zenith_analytical(lat_rad, hour_angle, decl)
# pvcdrom and cooper
eot = solarposition.equation_of_time_pvcdrom(times.dayofyear)
hour_angle = np.deg2rad(solarposition.hour_angle(times, lon, eot))
decl = solarposition.declination_cooper69(times.dayofyear)
zenith_2 = solarposition.solar_zenith_analytical(lat_rad, hour_angle, decl)
assert np.allclose(zenith_1, solar_zenith, atol=0.015)
assert np.allclose(zenith_2, solar_zenith, atol=0.025)
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)
# note: .dll extension is not needed
assy = clr.AddReference(str(src))
from clr import pv
lat, lon = 37.81, -122.25
tz = -8.0
dates = ["19900101T12:30:00", "19900102T12:30:00", "19900103T12:30:00", "19900104T12:30:00"]
print('Solar Position')
sp = pv.SolarPosition(dates, lat, lon, tz)
print('Day Angle, offset=1')
da = sp.CalcSimpleDayAngleArray()
eot = sp.EquationOfTimeSpencer71(da)
print('Equation of time, Spencer (1971)')
for doy in range(4):
print(f'{doy+1:d} --> {eot[doy]:g}')
doy = np.arange(4) + 1
eot_pvcdrom = equation_of_time_pvcdrom(doy)
eot_test = equation_of_time_spencer71(doy)
assert np.allclose([_ for _ in eot], eot_test)
decl = declination_spencer71(doy)
decl_cooper = declination_cooper69(doy)
ts = pd.DatetimeIndex(dates, tz=f'Etc/GMT{int(tz):+d}')
ha = hour_angle(ts, lon, eot_test)
sp_test = get_solarposition(ts, latitude=lat, longitude=lon)
ze = solar_zenith_analytical(37.81*np.pi/180.0, ha*np.pi/180.0, decl)*180/np.pi
