Anyone track their sleep on a flight before?

This is my attempt during a 10h flight earlier.. time shifted 6h, so think it was between 0000-0600

Looks awful but feeling surprisingly ok

Yeah me today DEN-MUC, feel good. I've managed to drive car and pickup dog, didn't fall asleep at wheel (thanks comma)

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my sleep is always garbage on a flight, so I never do.  I wonder why they call it "core" sleep as its the least important out of the bottom 3 stages..