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CIP-2307 channel offset 1 causes line through visibilities plot

Edna Sanchez requested to merge cip-2307-channel-offset-1-causes-line-through-visibilities-plot into main
  • before this MR, the last row (for channel 14880) had the lowest sky_frequency
  • example:

           sky_frequency  vis_XX_real  vis_XX_imag  vis_XY_real  vis_XY_imag  \ (more columns here. skipped)

channel                                                                       

1       296388288.000000     0.001226     0.000000     0.000003     0.000006  

2       296401728.000000     0.001227     0.000000     0.000011     0.000003  

3       296415168.000000     0.001231     0.000000     0.000007     0.000004  

4       296428608.000000     0.001239     0.000000    -0.000005     0.000006  

5       296442048.000000     0.001229     0.000000    -0.000006     0.000001 

 

           sky_frequency  vis_XX_real  vis_XX_imag  vis_XY_real  vis_XY_imag  \

channel                                                                        

14876   496308288.000000     0.001230     0.000000     0.000000     0.000003  

14877   496321728.000000     0.001240     0.000000     0.000012    -0.000005  

14878   496335168.000000     0.001249     0.000000     0.000002     0.000002  

14879   496348608.000000     0.001240     0.000000     0.000002    -0.000001  

14880   296374848.000000     0.001225     0.000000    -0.000008    -0.000001  

  • sorted vis_df data frame by sky frequency to get rid of line through visibilities plot
  • tested change locally and on the system-test branch: link to diff, link to python-test output and report (printed out the head and tail of the sorted df)

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