REVISION DATE: 19-Apr-2018 11:48:55

The graphs below show how I defined the tracks. Grey/green patches are what is averaged for each track.

 
Track pixels: 
Track:  1       2       3       4       5       6       7       8       9      10      11      12      13      14
Left:   1      74     150     223     296     369     440     512     585     656     729     802     875     951
Right:  73     149     222     295     368     439     511     584     655     728     801     875     950    1024

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