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.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
- iers_table = <IERS_Auto length=18296> 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 ... ... ... ... ... ... ... ... ... ... 23 1 26 59970.0 P ... P nan nan 0 23 1 27 59971.0 P ... P nan nan 0 23 1 28 59972.0 P ... P nan nan 0 23 1 29 59973.0 P ... P nan nan 0 23 1 30 59974.0 P ... P nan nan 0 23 1 31 59975.0 P ... P nan nan 0 23 2 1 59976.0 P ... P nan nan 0 23 2 2 59977.0 P ... P nan nan 0 23 2 3 59978.0 P ... P nan nan 0 23 2 4 59979.0 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 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
instanceWith IERS (Earth rotation) data columns