IERS_Auto¶
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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]¶ Bases:
astropy.utils.iers.IERS_A
Provide most-recent IERS data and automatically handle downloading of updated values as necessary.
Attributes Summary
iers_table
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
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iers_table
= <IERS_B length=20405> 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 ... ... ... ... ... ... ... ... ... ... 2017 11 3 58060.0 0.17817 ... 3.17e-05 1.29e-05 4.6e-05 4.2e-05 2017 11 4 58061.0 0.176815 ... 3.06e-05 1.29e-05 4.6e-05 4.2e-05 2017 11 5 58062.0 0.175231 ... 2.95e-05 1.3e-05 4.6e-05 4.3e-05 2017 11 6 58063.0 0.173459 ... 2.86e-05 1.3e-05 4.6e-05 4.3e-05 2017 11 7 58064.0 0.171803 ... 2.77e-05 1.3e-05 4.6e-05 4.3e-05 2017 11 8 58065.0 0.170591 ... 2.67e-05 1.31e-05 4.6e-05 4.3e-05 2017 11 9 58066.0 0.169119 ... 2.57e-05 1.31e-05 4.6e-05 4.3e-05 2017 11 10 58067.0 0.167648 ... 2.49e-05 1.32e-05 4.6e-05 4.3e-05 2017 11 11 58068.0 0.166396 ... 2.39e-05 1.32e-05 4.5e-05 4.3e-05 2017 11 12 58069.0 0.164923 ... 2.3e-05 1.33e-05 4.5e-05 4.3e-05¶
Methods Documentation
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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 thanastropy.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 thenastropy.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 toopen
will return this stored table.Returns: QTable
instance with IERS (Earth rotation) data columns
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