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:
astropy.utils.iers.iers.IERS_A
Provide most-recent IERS data and automatically handle downloading of updated values as necessary.
Attributes Summary
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=21905> 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 ... ... ... ... ... ... ... ... ... ... 2021 12 12 59560.0 0.095231 ... 7.4e-06 6.2e-06 5.7e-05 4.5e-05 2021 12 13 59561.0 0.092509 ... 7.6e-06 6.2e-06 5.7e-05 4.6e-05 2021 12 14 59562.0 0.090306 ... 7.1e-06 6.2e-06 5.8e-05 4.6e-05 2021 12 15 59563.0 0.087829 ... 6.9e-06 6.2e-06 5.8e-05 4.7e-05 2021 12 16 59564.0 0.085353 ... 6.9e-06 6.1e-06 5.9e-05 4.8e-05 2021 12 17 59565.0 0.082621 ... 6.7e-06 6.1e-06 5.9e-05 4.8e-05 2021 12 18 59566.0 0.080179 ... 6.9e-06 6.1e-06 6e-05 4.8e-05 2021 12 19 59567.0 0.078732 ... 6.9e-06 6.1e-06 6e-05 4.8e-05 2021 12 20 59568.0 0.077355 ... 6.9e-06 6.1e-06 6e-05 4.8e-05 2021 12 21 59569.0 0.075405 ... 6.8e-06 6.1e-06 6.1e-05 4.8e-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 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
instanceWith IERS (Earth rotation) data columns