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_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_Auto length=18002>  year month  day    MJD   PolPMFlag_A ... PolPMFlag dX_2000A dY_2000A NutFlag                      d                ...           marcsec  marcsec          int64 int64 int64 float64     str1    ...    str1   float64  float64    str1  ----- ----- ----- ------- ----------- ... --------- -------- -------- -------    73     1     2 41684.0           I ...         B      0.0      0.0       B    73     1     3 41685.0           I ...         B      0.0      0.0       B    73     1     4 41686.0           I ...         B      0.0      0.0       B    73     1     5 41687.0           I ...         B      0.0      0.0       B    73     1     6 41688.0           I ...         B      0.0      0.0       B    73     1     7 41689.0           I ...         B      0.0      0.0       B    73     1     8 41690.0           I ...         B      0.0      0.0       B    73     1     9 41691.0           I ...         B      0.0      0.0       B    73     1    10 41692.0           I ...         B      0.0      0.0       B   ...   ...   ...     ...         ... ...       ...      ...      ...     ...    22     4     7 59676.0           P ...         P      nan      nan       0    22     4     8 59677.0           P ...         P      nan      nan       0    22     4     9 59678.0           P ...         P      nan      nan       0    22     4    10 59679.0           P ...         P      nan      nan       0    22     4    11 59680.0           P ...         P      nan      nan       0    22     4    12 59681.0           P ...         P      nan      nan       0    22     4    13 59682.0           P ...         P      nan      nan       0    22     4    14 59683.0           P ...         P      nan      nan       0    22     4    15 59684.0           P ...         P      nan      nan       0    22     4    16 59685.0           P ...         P      nan      nan       0

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