8000 Correct cloud_cover_to_transmittance_linear documentation by JoLo90 · Pull Request #1370 · pvlib/pvlib-python · GitHub
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Correct cloud_cover_to_transmittance_linear documentation #1370

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Merged
merged 7 commits into from
Jan 15, 2022
Merged

Correct cloud_cover_to_transmittance_linear documentation #1370

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5a70881
Modify cloud_cover_to_transmittance_linear documentation replacing gh…
Jan 7, 2022
a8602ed
Add documentation lines into v0.9.1.rst
Jan 7, 2022
6b6e1a2
Modify line length in documentation
Jan 7, 2022
4034f5a
Small modifs doc forecast.py
Jan 7, 2022
d6e0feb
Small modifs doc forecast.py
Jan 7, 2022
6d4f967
Update pvlib/forecast.py
JoLo90 Jan 7, 2022
3beecc4
Rewording documentation forecast.py
Jan 7, 2022
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4 changes: 4 additions & 0 deletions docs/sphinx/source/whatsnew/v0.9.1.rst
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Expand Up @@ -29,6 +29,9 @@ Testing

Documentation
~~~~~~~~~~~~~
* Fix documentation return error in :py:meth:`pvlib.forecast.ForecastModel.cloud_cover_to_transmittance_linear`
(:issue:`1367`, :pull:`1370`)


Requirements
~~~~~~~~~~~~
Expand All @@ -41,3 +44,4 @@ Contributors
* Christian Weickhmann (:ghuser:`cweickhmann`)
* Kevin Anderson (:ghuser:`kanderso-nrel`)
* Adam R. Jensen (:ghuser:`AdamRJensen`)
* Johann Loux (:ghuser:`JoLo90`)
13 changes: 7 additions & 6 deletions pvlib/forecast.py
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Expand Up @@ -512,10 +512,10 @@ def cloud_cover_to_irradiance_clearsky_scaling(self, cloud_cover,
def cloud_cover_to_transmittance_linear(self, cloud_cover, offset=0.75,
**kwargs):
"""
Convert cloud cover to atmospheric transmittance using a linear
model.
Convert cloud cover (percentage) to atmospheric transmittance
using a linear model.

0% cloud cover returns offset.
0% cloud cover returns "offset".

100% cloud cover returns 0.

Expand All @@ -524,14 +524,15 @@ def cloud_cover_to_transmittance_linear(self, cloud_cover, offset=0.75,
cloud_cover : numeric
Cloud cover in %.
offset : numeric, default 0.75
Determines the maximum transmittance.
Determines the maximum transmittance. [unitless]
kwargs
Not used.

Returns
-------
ghi : numeric
Estimated GHI.
transmittance : numeric
The fraction of extraterrestrial irradiance that reaches
the ground. [unitless]
"""
transmittance = ((100.0 - cloud_cover) / 100.0) * offset

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