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, **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

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=21366> 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 ... ... ... ... ... ... ... ... ... ... 2020 6 21 59021.0 0.149318 ... 9.9e-06 1.3e-05 7.1e-05 6.3e-05 2020 6 22 59022.0 0.151165 ... 9.8e-06 1.3e-05 7.2e-05 6.3e-05 2020 6 23 59023.0 0.152512 ... 9.8e-06 1.31e-05 7.2e-05 6.3e-05 2020 6 24 59024.0 0.153952 ... 9.8e-06 1.32e-05 7.3e-05 6.3e-05 2020 6 25 59025.0 0.155405 ... 9.8e-06 1.32e-05 7.4e-05 6.3e-05 2020 6 26 59026.0 0.156914 ... 9.8e-06 1.33e-05 7.4e-05 6.3e-05 2020 6 27 59027.0 0.158872 ... 9.9e-06 1.33e-05 7.5e-05 6.3e-05 2020 6 28 59028.0 0.160841 ... 9.9e-06 1.34e-05 7.6e-05 6.3e-05 2020 6 29 59029.0 0.16274 ... 9.8e-06 1.35e-05 7.6e-05 6.3e-05 2020 6 30 59030.0 0.164783 ... 9.8e-06 1.35e-05 7.7e-05 6.3e-05

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