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Hi,

I am trying to use TwGeos::preprocessLight() to identify twilights in light data collected by Lotek LAT280 tags. The below is the log of the "Light Intensity" variable. This approach doesn't seem to give great definition between the dark and light sections and makes picking a threshold challenging.  Does anyone have any suggestions for a transformation, a threshold, or an alternative approach with the data from this tag?

Thanks!

image.png

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maybe without log-transformation?

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