UJC,
Good comprehensive info and viewpoint. Thanks.
One comment:
I may be wrong here concerning your particular plot and what data was transmitted to who, it's been awhile, but having flown both B-738 and A330 sims with early ADS-B "In" capability simulated and displayed in the cockpit, I seem to recall our ADS-B speed data was KTAS taken directly from the displayed traffic ADCs before transmission, and was not relative position dependent (i.e. ground speed). IIRC we had a time referenced on board interval management software that was based on KTAS. Ground based info may be different. (If I'm wrong, unlike some people, I'll concede.
)
In any case, my source tells me that in the T-34 or T-6, a cross-controlled departure condition can instantly flip you inverted.