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
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=22523> 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 8 22 0 60178.0 ... 0.000122 6.8e-05 8.3e-05 2.52e-05 2023 8 23 0 60179.0 ... 0.000124 7.1e-05 8.5e-05 2.43e-05 2023 8 24 0 60180.0 ... 0.00016 7.7e-05 9.5e-05 2.42e-05 2023 8 25 0 60181.0 ... 0.000212 7.7e-05 9.7e-05 2.47e-05 2023 8 26 0 60182.0 ... 0.000207 7.8e-05 9e-05 2.48e-05 2023 8 27 0 60183.0 ... 0.000167 7.7e-05 8.7e-05 2.61e-05 2023 8 28 0 60184.0 ... 0.000118 7.4e-05 8.4e-05 2.56e-05 2023 8 29 0 60185.0 ... 8.1e-05 7.2e-05 8.7e-05 2.6e-05 2023 8 30 0 60186.0 ... 7.9e-05 7.3e-05 8.9e-05 2.78e-05 2023 8 31 0 60187.0 ... 8.7e-05 7.9e-05 8.9e-05 2.82e-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