<TOXSWA_cwa> data from file 3.out segment 20 
             datetime     t t_firstjan t_rel_to_max cwa_mug_per_L
1 1978-10-01 00:00:00 0.000   273.0000      -55.083             0
2 1978-10-01 01:00:00 0.042   273.0417      -55.041             0
3 1978-10-01 02:00:00 0.083   273.0833      -55.000             0
4 1978-10-01 03:00:00 0.125   273.1250      -54.958             0
5 1978-10-01 04:00:00 0.167   273.1667      -54.916             0
6 1978-10-01 05:00:00 0.208   273.2083      -54.875             0
Moving window analysis
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