IERS_B

class astropy.utils.iers.IERS_B(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 Table class targeted to IERS B, provided by IERS itself.

These are final values; see https://www.iers.org/IERS/EN/Home/home_node.html

Notes

If the package IERS B file (`iers.IERS_B_FILE) is out of date, a new version can be downloaded from iers.IERS_B_URL.

Attributes Summary

iers_table

Cached table, returned if open is called without arguments.

Methods Summary

dcip_source(i)

Set CIP correction source flag for entries in IERS table

pm_source(i)

Set PM source flag for entries in IERS table

read([file, readme, data_start])

Read IERS-B table from a eopc04_iau2000.* file provided by IERS.

ut1_utc_source(i)

Set UT1-UTC source flag for entries in IERS table

Attributes Documentation

iers_table = <IERS_B length=21742>  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   ...   ...   ...     ...       ... ...       ...     ...        ...        ...  2021     7     2 59397.0  0.206921 ...  1.07e-05 6.8e-06    5.4e-05    5.3e-05  2021     7     3 59398.0  0.209024 ...  1.08e-05 6.9e-06    5.5e-05    5.3e-05  2021     7     4 59399.0  0.211331 ...   1.1e-05 6.9e-06    5.6e-05    5.3e-05  2021     7     5 59400.0  0.213414 ...  1.11e-05   7e-06    5.6e-05    5.3e-05  2021     7     6 59401.0   0.21565 ...  1.11e-05 6.8e-06    5.7e-05    5.4e-05  2021     7     7 59402.0   0.21814 ...  1.09e-05 6.8e-06    5.7e-05    5.4e-05  2021     7     8 59403.0  0.220214 ...  1.04e-05 6.8e-06    5.8e-05    5.4e-05  2021     7     9 59404.0  0.221832 ...  1.03e-05 6.8e-06    5.9e-05    5.4e-05  2021     7    10 59405.0    0.2236 ...  1.03e-05 6.8e-06    5.9e-05    5.4e-05  2021     7    11 59406.0  0.225666 ...  1.03e-05 6.8e-06      6e-05    5.3e-05

Cached table, returned if open is called without arguments.

Methods Documentation

dcip_source(i)[source]

Set CIP correction source flag for entries in IERS table

pm_source(i)[source]

Set PM source flag for entries in IERS table

classmethod read(file=None, readme=None, data_start=14)[source]

Read IERS-B table from a eopc04_iau2000.* file provided by IERS.

Parameters
filestr

full path to ascii file holding IERS-B data. Defaults to package version, iers.IERS_B_FILE.

readmestr

full path to ascii file holding CDS-style readme. Defaults to package version, iers.IERS_B_README.

data_startint

starting row. Default is 14, appropriate for standard IERS files.

Returns
IERS_B class instance
ut1_utc_source(i)[source]

Set UT1-UTC source flag for entries in IERS table