Slit feature resolutions at 7.5um in medium mode

The picture above shows the line IDs for the H20 band near 1315 cm-1 in medium resolution mode.

I calculate a velocity per pixel of:  2.53 km/s/pix

I was forced to only use frames 1 and 2 of the SUTR data to avoid saturation.

And below is a table of the FWHM of the lines, which were calculated by fitting 5-parameter Gaussian functions across the 20 central-most rows of each line. The values below are the median(sigma*2.355) for the 20 fits across each line.
The line pair at 1313.5 and 1313.6 were partly blended, even with 1.5 km/s, so I didn't record their widths. Where other entries are missing, it is either due to blending, or to saturation.

#slit            file    1        2         3      6      7       8
1.5 km/s        b032    7.77     6.81    6.88    6.36    6.10    6.22
2.0 km/s        b031    8.68     7.58    7.80    7.30            7.32
2.7 km/s        b030    9.70     8.85    8.97                    8.78
3.5 km/s        b029   11.75    11.26   11.59                   10.81               

4.5 km/s        b038            13.89                           13.54          
6.0 km/s        b037            18.30                                                 

flux slit       b036       

 For the mean values of FWHM, the resolutions are: 
#slit            mean(FWHM)    v_res(km/s)    R
1.5 km/s        6.69            16.9        17700
2.0 km/s        7.74            19.6        15300
2.7 km/s        9.08            23.0        13100
3.5 km/s        11.35           28.7        10400
4.5 km/s        13.72           34.7         8600
6.0 km/s        18.30           46.3         6500

Also, it seems clear that the right side is in better focus than the left. This was not clear to see in the high res modes. See the plot below.