The change in measured width divided by the elapsed time between comparable observations.
Use
This value describes an observation series and should be read with the underlying dates, locations and methods.
Unit discipline
Do not combine readings from incompatible instruments or locations into one apparent trend.
Observe→Distinguish→Control source→Verify
Living dossierPublished knowledge is connected and improved as new cases, images and outcomes are added. Updated 2026-07-20.
