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- IERS_Auto

# 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)

  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`() | 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_B length=22248> year month day MJD PM_x ... e_UT1_UTC e_LOD e_dX_2000A e_dY_2000A d arcsec ... s s arcsec arcsec int64 int64 int64 float64 float64 ... float64 float64 float64 float64 ----- ----- ----- ------- --------- ... --------- ------- ---------- ---------- 1962 1 1 37665.0 -0.0127 ... 0.002 0.0014 0.004774 0.002 1962 1 2 37666.0 -0.0159 ... 0.002 0.0014 0.004774 0.002 1962 1 3 37667.0 -0.019 ... 0.002 0.0014 0.004774 0.002 1962 1 4 37668.0 -0.021999 ... 0.002 0.0014 0.004774 0.002 1962 1 5 37669.0 -0.024799 ... 0.002 0.0014 0.004774 0.002 1962 1 6 37670.0 -0.027599 ... 0.002 0.0014 0.004774 0.002 1962 1 7 37671.0 -0.030199 ... 0.002 0.0014 0.004774 0.002 1962 1 8 37672.0 -0.032798 ... 0.002 0.0014 0.004774 0.002 1962 1 9 37673.0 -0.035198 ... 0.002 0.0014 0.004774 0.002 ... ... ... ... ... ... ... ... ... ... 2022 11 20 59903.0 0.174678 ... 9.1e-06 7.2e-06 6.9e-05 5.8e-05 2022 11 21 59904.0 0.172482 ... 8.9e-06 7.1e-06 6.8e-05 5.6e-05 2022 11 22 59905.0 0.170135 ... 1.05e-05 7e-06 6.8e-05 5.5e-05 2022 11 23 59906.0 0.167864 ... 1.01e-05 7.1e-06 6.8e-05 5.4e-05 2022 11 24 59907.0 0.165815 ... 1e-05 7.1e-06 6.7e-05 5.4e-05 2022 11 25 59908.0 0.163449 ... 9.7e-06 7.1e-06 6.7e-05 5.4e-05 2022 11 26 59909.0 0.160439 ... 9.5e-06 7e-06 6.7e-05 5.3e-05 2022 11 27 59910.0 0.156985 ... 9.4e-06 7e-06 6.7e-05 5.2e-05 2022 11 28 59911.0 0.153168 ... 9.4e-06 6.5e-06 6.7e-05 5.1e-05 2022 11 29 59912.0 0.149881 ... 9.3e-06 7.1e-06 6.6e-05 5.1e-05

    Cached table, returned if `open` is called without arguments.

  Methods Documentation

  classmethod 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. 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