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)

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

iers_table = <IERS_Auto length=18114> 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 7 28 59788.0 P ... P nan nan 0 22 7 29 59789.0 P ... P nan nan 0 22 7 30 59790.0 P ... P nan nan 0 22 7 31 59791.0 P ... P nan nan 0 22 8 1 59792.0 P ... P nan nan 0 22 8 2 59793.0 P ... P nan nan 0 22 8 3 59794.0 P ... P nan nan 0 22 8 4 59795.0 P ... P nan nan 0 22 8 5 59796.0 P ... P nan nan 0 22 8 6 59797.0 P ... P nan nan 0

Methods Documentation

classmethod 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. 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