Global fit of measurements for the ground state of 2-chloropropene, as reported in
Z.Kisiel, J. Kosarzewski, Acta Physica Polonica a, xxx, xxx (2017)
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The global fit is to combined three data sets:

1/ hyperfine resolved chirped pulse data set, Warsaw
   (5 kHz frequency uncertainty)
   
2/ hyperfine resolved room-temperature data set from:
   E.Fliege, H.Dreizler, Z.Naturforsch. 38a,1232(1983)
   (15 kHz frequency uncertainty)

3/ hyperfine unresolved mmw data set from Warsaw
   (50 kHz frequency uncertainty)

Since some transitions appeared in both sets 1 and 2 it was possible
to double check their precision, which pointed out some inconsistencies in 
data set 2.  For this reason the 3sigma cutoff criterion of SPFIT was used
to establish the effective frequency uncertainty of set 2 as approximately 15 kHz, 
at which 21 lines from this set were still rejected from the fit.

In the PIFORM subset statistics below the values of the v identifier of 0,1,2
correspond to data sets 1,2,3 respectively.

MICROWAVE       lines fitted       lines    lines      RMS      RMS ERROR    J range  Ka range    freq. range
            total   dv=0 dv.ne.0   UNFITTD  e>900
v"= 0         24     24      0        0      0       0.004477     0.89542     0   3    0   1     8275    18273
v"= 1         89     89      0       21      0       0.012896     0.85975     0  39    0  15     5007    17065
v"= 2         89     89      0        0      0       0.041956     0.83912    13  46    0  26   108432   310957
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total:       202    202      0       21      0       0.029176     0.85508