times and coordinates derived from UTC could be wrong by 1s or more

[anshusolar]

While using DP3, I am getting this warning:

I am using DP3 to predict the parameters for calibration.

predict.parset file contains:

msin=L242128_SB100_uv.dppp.MS
msout=.
steps=[gaincal]
gaincal.usebeammodel=True
gaincal.solint=4
gaincal.sources=VirA
gaincal.sourcedb=VirA.sourcedb
gaincal.onebeamperpatch=True
gaincal.caltype=diagonal

L242128_SB100_uv.dppp.MS is VirA MS.

2022-06-30 10:16:38 SEVERE  MeasTable::dUTC(Double) (file /opt/lofarsoft/data/casacore-2.4.1/measures/Measures/MeasTable.cc, line 4396) Leap second table TAI_UTC seems out-of-date. 
2022-06-30 10:16:38 SEVERE  MeasTable::dUTC(Double) (file /opt/lofarsoft/data/casacore-2.4.1/measures/Measures/MeasTable.cc, line 4396)+    Until the table is updated (see the CASA documentation or your system admin),
2022-06-30 10:16:38 SEVERE  MeasTable::dUTC(Double) (file /opt/lofarsoft/data/casacore-2.4.1/measures/Measures/MeasTable.cc, line 4396)+    times and coordinates derived from UTC could be wrong by 1s or more.

[tammojan]

This warning has to do with the casacore measures data. Please update them, either system-wide or as a user.

The command that fixes it in our Docker container is:

wget -nv -O /WSRT_Measures.ztar ftp://ftp.astron.nl/outgoing/Measures/WSRT_Measures.ztar \
    && cd /var/lib/casacore/data \
    && tar xfz /WSRT_Measures.ztar \
    && rm /WSRT_Measures.ztar

If you don't have root access, you can download the measures data from ftp://ftp.astron.nl/outgoing/Measures/WSRT_Measures.ztar and untar it somewhere. Then in ~/.casarc, set the location to the new measures data. For example, my ~/.casarc looks like this:

measures.directory: ~/opt/casacore/data

and ~/opt/casacore/data contains the directories ephemerides and geodetic from the tarball.

You can find the location of the currently used measures data with casacores program findmeastable.