What are the criteria for setting the search radius lower and upper bound?

[AnjalyPrasannajith]

Hi UTrack community,
I am trying to track Eb1 comets with UTrack. My movies are 31 frames taken at 2sec intervals in 2D. my average comet length is ~10pixels. 1 pixel=108.33 nm. How do I calculate what numbers to use for my search radius lower and upper bound?

Any guidance will will greatly appreciated. Thank you for looking into this matter.