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improve performance of solarposition.ephemeris dataframe assembly #529

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Merged
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Aug 14, 2018
Merged

improve performance of solarposition.ephemeris dataframe assembly #529

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1 change: 1 addition & 0 deletions docs/sphinx/source/whatsnew/v0.6.0.rst
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Expand Up @@ -60,6 +60,7 @@ Enhancements
:func:`~pvlib.singlediode.bishop88_mpp`.
* Add PVSyst thin-film recombination losses for CdTe and a:Si (:issue:`163`)
* Python 3.7 officially supported. (:issue:`496`)
* Improve performance of solarposition.ephemeris. (:issue:`512`)


Bug fixes
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3 changes: 2 additions & 1 deletion pvlib/solarposition.py
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Expand Up @@ -690,13 +690,14 @@ def ephemeris(time, latitude, longitude, pressure=101325, temperature=12):
ApparentSunEl = SunEl + Refract

# make output DataFrame
DFOut = pd.DataFrame(index=time)
DFOut = pd.DataFrame(index=time_utc)
DFOut['apparent_elevation'] = ApparentSunEl
DFOut['elevation'] = SunEl
DFOut['azimuth'] = SunAz
DFOut['apparent_zenith'] = 90 - ApparentSunEl
DFOut['zenith'] = 90 - SunEl
DFOut['solar_time'] = SolarTime
DFOut.index = time

return DFOut

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13 changes: 13 additions & 0 deletions pvlib/test/test_solarposition.py
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Expand Up @@ -260,6 +260,19 @@ def test_ephemeris_physical_dst(expected_solpos):
assert_frame_equal(expected_solpos, ephem_data[expected_solpos.columns])


def test_ephemeris_physical_no_tz(expected_solpos):
times = pd.date_range(datetime.datetime(2003,10,17,19,30,30),
periods=1, freq='D')
ephem_data = solarposition.ephemeris(times, golden_mst.latitude,
golden_mst.longitude,
pressure=82000,
temperature=11)
expected_solpos.index = times
expected_solpos = np.round(expected_solpos, 2)
ephem_data = np.round(ephem_data, 2)
assert_frame_equal(expected_solpos, ephem_data[expected_solpos.columns])


def test_get_solarposition_error():
times = pd.date_range(datetime.datetime(2003,10,17,13,30,30),
periods=1, freq='D', tz=golden.tz)
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