IERS_Auto¶

class astropy.utils.iers.IERS_Auto(data=None, masked=False, names=None, dtype=None, meta=None, copy=True, rows=None, copy_indices=True, units=None, descriptions=None, **kwargs)[source]¶

Bases: IERS_A

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

Attributes Summary

iers_table

Cached table, returned if open is called without arguments.

Methods Summary

open()

Attributes Documentation

iers_table = <IERS_B length=22552> year month day hour MJD ... e_dY_2000A e_PM_x_dot e_PM_y_dot e_LOD d ... arcsec arcsec / d arcsec / d s int64 int64 int64 int64 float64 ... float64 float64 float64 float64 ----- ----- ----- ----- ------- ... ---------- ---------- ---------- -------- 1962 1 1 0 37665.0 ... 0.002 0.0 0.0 0.0014 1962 1 2 0 37666.0 ... 0.002 0.0 0.0 0.0014 1962 1 3 0 37667.0 ... 0.002 0.0 0.0 0.0014 1962 1 4 0 37668.0 ... 0.002 0.0 0.0 0.0014 1962 1 5 0 37669.0 ... 0.002 0.0 0.0 0.0014 1962 1 6 0 37670.0 ... 0.002 0.0 0.0 0.0014 1962 1 7 0 37671.0 ... 0.002 0.0 0.0 0.0014 1962 1 8 0 37672.0 ... 0.002 0.0 0.0 0.0014 1962 1 9 0 37673.0 ... 0.002 0.0 0.0 0.0014 ... ... ... ... ... ... ... ... ... ... 2023 9 20 0 60207.0 ... 4.3e-05 6.1e-05 8.3e-05 2.53e-05 2023 9 21 0 60208.0 ... 4.6e-05 6.8e-05 8.6e-05 2.58e-05 2023 9 22 0 60209.0 ... 4.8e-05 6.6e-05 8.4e-05 2.64e-05 2023 9 23 0 60210.0 ... 4.8e-05 6.5e-05 8.5e-05 2.77e-05 2023 9 24 0 60211.0 ... 4.8e-05 6.5e-05 8e-05 2.79e-05 2023 9 25 0 60212.0 ... 4.9e-05 6.5e-05 8.6e-05 2.75e-05 2023 9 26 0 60213.0 ... 4.9e-05 6.6e-05 9e-05 2.8e-05 2023 9 27 0 60214.0 ... 4.9e-05 6.5e-05 9.3e-05 5.78e-05 2023 9 28 0 60215.0 ... 4.9e-05 6.7e-05 9.2e-05 4.76e-05 2023 9 29 0 60216.0 ... 4.8e-05 6.4e-05 9e-05 4.09e-05¶: Cached table, returned if open is called without arguments.

Methods Documentation

classmethod open()[source]¶

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

IERS_A

IERS_B