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.

The returned table combines the IERS-A and IERS-B files, with the data in the IERS-B file considered to be official values and thus superseding values from the IERS-A file at the same times.

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=19325>  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   ...   ...   ...     ...         ... ...       ...      ...      ...     ...    25    11    21 61000.0           P ...         P      nan      nan       0    25    11    22 61001.0           P ...         P      nan      nan       0    25    11    23 61002.0           P ...         P      nan      nan       0    25    11    24 61003.0           P ...         P      nan      nan       0    25    11    25 61004.0           P ...         P      nan      nan       0    25    11    26 61005.0           P ...         P      nan      nan       0    25    11    27 61006.0           P ...         P      nan      nan       0    25    11    28 61007.0           P ...         P      nan      nan       0    25    11    29 61008.0           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 the bundled IERS-A table will be used rather than any downloaded version of the IERS-A table.

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