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Add sub-second timestamp resolution to USNO #157

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Merged
AdamRJensen merged 3 commits into from
Jul 30, 2026
Merged

Add sub-second timestamp resolution to USNO #157

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aff44ca
Simplify conversion of times to midnight
AdamRJensen Jul 29, 2026
2dcffb4
Trigger tests actions
AdamRJensen Jul 30, 2026
4de6559
Update whatsnew.rst
AdamRJensen Jul 30, 2026
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2 changes: 2 additions & 0 deletions docs/source/whatsnew.rst
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Original file line number Diff line number Diff line change
Expand Up @@ -14,6 +14,8 @@ Changed
^^^^^^^
* matplotlib is now an optional ``doc`` dependency instead of a required
dependency. (:pull:`146`)
* Add support for correctly handling sub-second timestamp resolution in
:py:func:`solposx.solarposition.usno`. (:issue:`156`, :pull:`157`)

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^^^^^
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4 changes: 1 addition & 3 deletions src/solposx/solarposition/usno.py
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Expand Up @@ -85,9 +85,7 @@ def usno(times, latitude, longitude, *, delta_t=67.0, gmst_option=1):
d = asind(sind(e) * sind(L))

# JD_0 is the Julian date of the previous midnight (0h) UT1
midnight = pd.DatetimeIndex(
[t.replace(hour=0, minute=0, second=0) for t in times_utc]
)
midnight = times_utc.normalize() # Convert times_utc to midnight

JD_0 = midnight.to_julian_date()

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