IERS_Auto¶
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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
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
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iers_table
= <IERS_Auto length=18044> year month day MJD PolPMFlag_A PM_x_A e_PM_x_A ... PM_x PM_y PolPMFlag dX_2000A dY_2000A NutFlag d arcsec arcsec ... arcsec arcsec marcsec marcsec int64 int64 int64 float64 str1 float64 float64 ... float64 float64 str1 float64 float64 str1 ----- ----- ----- ------- ----------- -------- -------- ... -------- -------- --------- -------- -------- ------- 73 1 2 41684.0 I 0.120733 0.009786 ... 0.1235 0.123 B 0.0 0.0 B 73 1 3 41685.0 I 0.11898 0.011039 ... 0.1223 0.121 B 0.0 0.0 B 73 1 4 41686.0 I 0.117227 0.011039 ... 0.120901 0.119001 B 0.0 0.0 B 73 1 5 41687.0 I 0.115473 0.009743 ... 0.119601 0.117101 B 0.0 0.0 B 73 1 6 41688.0 I 0.113717 0.011236 ... 0.118201 0.115201 B 0.0 0.0 B 73 1 7 41689.0 I 0.111957 0.012506 ... 0.116802 0.113402 B 0.0 0.0 B 73 1 8 41690.0 I 0.110189 0.012042 ... 0.115302 0.111602 B 0.0 0.0 B 73 1 9 41691.0 I 0.10841 0.011753 ... 0.113802 0.109802 B 0.0 0.0 B ... ... ... ... ... ... ... ... ... ... ... ... ... ... 22 5 21 59720.0 P 0.099852 0.017658 ... 0.099852 0.475892 P nan nan 0 22 5 22 59721.0 P 0.101901 0.017686 ... 0.101901 0.476344 P nan nan 0 22 5 23 59722.0 P 0.103958 0.017713 ... 0.103958 0.476764 P nan nan 0 22 5 24 59723.0 P 0.106021 0.01774 ... 0.106021 0.477152 P nan nan 0 22 5 25 59724.0 P 0.108091 0.017768 ... 0.108091 0.477509 P nan nan 0 22 5 26 59725.0 P 0.110167 0.017795 ... 0.110167 0.477834 P nan nan 0 22 5 27 59726.0 P 0.112248 0.017822 ... 0.112248 0.478127 P nan nan 0 22 5 28 59727.0 P 0.114333 0.01785 ... 0.114333 0.478389 P nan nan 0¶ Cached table, returned if
open
is called without arguments.
Methods Documentation
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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
instance with IERS (Earth rotation) data columns
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