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Format of deltat.preds changed?

See original GitHub issue

If I’m not mistaking, the format of deltat.preds provided by the USNO recently changed. While in the old format, it looked like this:

YEAR TT-UT PREDICTION UT1-UTC PREDICTION ERROR

2017.00 68.591 -0.408 0.000 2017.25 68.72 0.469 0.00 2017.50 68.81 0.376 0.01

The new layout is:

MJD YEAR TT-UT Pred UT1-UTC Pred ERROR

58484.000 2019.00 69.34 -0.152 0.117
58575.000 2019.25 69.48 -0.295 0.162
58666.000 2019.50 69.62 -0.440 0.215

Hence, when running

from skyfield.api import load ts = load.timescale()

Skyfield crashes with an error like

ValueError: year 58668 is out of range

Issue Analytics

  • State:closed
  • Created 5 years ago
  • Reactions:4
  • Comments:5 (3 by maintainers)

github_iconTop GitHub Comments

1reaction
brandon-rhodescommented, Feb 5, 2019

Wonderful, I’m glad it’s working for you now! Let me know in the future if you run into any more problems.

0reactions
brandon-rhodescommented, Mar 6, 2019

Thanks for the note! 😃

Read more comments on GitHub >

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