# IERS_Auto¶

class astropy.utils.iers.IERS_Auto(data=None, masked=None, names=None, dtype=None, meta=None, copy=True, rows=None, copy_indices=True, **kwargs)[source] [edit on github]

Provide most-recent IERS data and automatically handle downloading of updated values as necessary.

Attributes Summary

Methods Summary

 open() If the configuration setting astropy.utils.iers.conf.auto_download is set to True (default), then open a recent version of the IERS-A table with predictions for UT1-UTC and polar motion out to approximately one year from now.

Attributes Documentation

iers_table = <IERS_Auto length=17022> year month day MJD PolPMFlag_A ... PolPMFlag dX_2000A dY_2000A NutFlag d ... marcsec marcsec int64 int64 int64 float64 str1 ... str1 float64 float64 str1 ----- ----- ----- ------- ----------- ... --------- -------- -------- ------- 73 1 2 41684.0 I ... B -18.637 -3.667 B 73 1 3 41685.0 I ... B -18.636 -3.571 B 73 1 4 41686.0 I ... B -18.669 -3.621 B 73 1 5 41687.0 I ... B -18.751 -3.769 B 73 1 6 41688.0 I ... B -18.868 -3.868 B 73 1 7 41689.0 I ... B -18.959 -3.842 B 73 1 8 41690.0 I ... B -18.976 -3.75 B 73 1 9 41691.0 I ... B -18.934 -3.698 B 73 1 10 41692.0 I ... B -18.889 -3.732 B ... ... ... ... ... ... ... ... ... ... 19 8 1 58696.0 P ... P 0.0 0.0 0 19 8 2 58697.0 P ... P 0.0 0.0 0 19 8 3 58698.0 P ... P 0.0 0.0 0 19 8 4 58699.0 P ... P 0.0 0.0 0 19 8 5 58700.0 P ... P 0.0 0.0 0 19 8 6 58701.0 P ... P 0.0 0.0 0 19 8 7 58702.0 P ... P 0.0 0.0 0 19 8 8 58703.0 P ... P 0.0 0.0 0 19 8 9 58704.0 P ... P 0.0 0.0 0 19 8 10 58705.0 P ... P 0.0 0.0 0

Methods Documentation

classmethod open()[source] [edit on github]

If the configuration setting astropy.utils.iers.conf.auto_download is set to True (default), then open a recent version of the IERS-A table with predictions for UT1-UTC and polar motion out to approximately one year from now. If the available version of this file is older than astropy.utils.iers.conf.auto_max_age days old (or non-existent) then it will be downloaded over the network and cached.

If the configuration setting astropy.utils.iers.conf.auto_download is set to False then astropy.utils.iers.IERS() is returned. This is normally the IERS-B table that is supplied with astropy.

On the first call in a session, the table will be memoized (in the iers_table class attribute), and further calls to open will return this stored table.

Returns: QTable instance with IERS (Earth rotation) data columns