Unable to load CASA measurement sets for both simulated data and observed data

[Arnab-half-blood-prince]

Hi, I am unable to load the CASA ms files in pyuvdata. I have installed the latest version of pyuvdata also astropy and numpy and casacore are latest version installed using conda. Everytime, I am trying to load the data one error is showing -

/home/arnab/anaconda2/lib/python2.7/site-packages/astropy/utils/iers/iers.pyc in _check_interpolate_indices(self, indices_orig, indices_clipped, max_input_mjd) 272 """ 273 if np.any(indices_orig != indices_clipped): --> 274 raise IERSRangeError('(some) times are outside of range covered ' 275 'by IERS table.') 276

IERSRangeError: (some) times are outside of range covered by IERS table.

I have tried for both GMRT observation also simulation of HERA,MWA,SKA using CASAsim.

However, it worked perfectly when I simulate HERA using PRIsim using Nithyanandan Thyagarajan's simulation tool .

I do not know what's wrong in CASA ms set.

[bhazelton]

I believe this is related to some problems with the USNO IERS servers, which was accounted for in astropy 3.2.3. Can you check what version of astropy you have installed?

[Arnab-half-blood-prince]

Yes. It seems version problem of astropy. I have installed now astropy4.0. and it works. Here is the output of the iptyhon attached :

In [1]: import astropy

In [2]: from pyuvdata import *

In [3]: uv = UVData()

In [4]: uv.read_uvfits('sem_trecs_mwa_old_64chan_z_9_125KHz_resolution_8MHz_BW.fits')
Telescope VLA is not in known_telescopes. Downloading ftp://cddis.gsfc.nasa.gov/pub/products/iers/finals2000A.all from https://datacenter.iers.org/data/9/finals2000A.all |=========================================================================================================| 3.3M/3.3M (100.00%) 1s

In [5]: astropy.version
Out[5]: '4.0'