ut1_from_utc

spacekernel.time.ut1_from_utc(jd12_utc: ndarray[double]) → ndarray[double]

Convert two‐part Julian Dates from UTC to UT1 (Universal Time).

Parameters:

jd12_utcndarray of float, shape (N, 2)

Two-part Julian Date entries in the UTC timescale.

Returns:

jd12_ut1ndarray of float, shape (N, 2)

Two-part Julian Date entries in the UT1 timescale.

Notes

1. Converts UTC → TAI via c_tai_from_utc.

2. Converts TAI → TT via c_tt_from_tai.

3. Applies Earth‒rotation offsets (TT–UT1) from EOP data.

4. Dispatches to c_ut1_from_tt for the final TT→UT1 conversion.