Does anyone have any idea how SeeYou calculates the (ground) velocity at any
given fix in a flight?

I'm examining the take-off segment of one of my log files, and when I
calculate the velocity using the ubiquitous Great Circle algorithm from the
previous fix to the current fix, I get velocities that are *much* higher
than what SeeYou shows in the hover-hints as you trace the mouse along the
route.

Hack hack hack

~ted w/2NO