Plot IERS corrections

This notebook shows the various options for IERS corrections over the course of the DESI survey.



In [1]:

    
%matplotlib inline
from astropy.utils import iers
from desiutil.plots import plot_iers
iers.conf.iers_auto_url = 'ftp://cddis.gsfc.nasa.gov/pub/products/iers/finals2000A.all'



In [2]:

    
fig, ax = plot_iers('auto')









    



WARNING: ErfaWarning: ERFA function "dtf2d" yielded 1 of "dubious year (Note 6)" [astropy._erfa.core]
WARNING: ErfaWarning: ERFA function "d2dtf" yielded 1 of "dubious year (Note 5)" [astropy._erfa.core]



In [3]:

    
fig, ax = plot_iers('A')









    



Downloading ftp://cddis.gsfc.nasa.gov/pub/products/iers/finals2000A.all [Done]



In [4]:

    
fig, ax = plot_iers('B')









    



WARNING: ErfaWarning: ERFA function "dtf2d" yielded 1 of "dubious year (Note 6)" [astropy._erfa.core]
WARNING: ErfaWarning: ERFA function "d2dtf" yielded 1 of "dubious year (Note 5)" [astropy._erfa.core]



In [5]:

    
fig, ax = plot_iers('frozen')









    



INFO:iers.py:78:freeze_iers: Freezing IERS table used by astropy time, coordinates.



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