Please.
GS mini kicks on the difference between the tower-reported runway wind and the actual wind. It only manifests itself when there is a large difference between the two.
Case on a northerly runway, coastal perhaps. QFU 000.
W/V TWR-RWY = 300/12 kts (headwind 6)
airborne w/v @1300 ft = 340 / 45 (headwind 40)
Vapp-final 132 kts and:
on a conventional calculation: Vtarget = 135 kts (TAS 138 ish -> GS 98)
for a GS-mini bus: Vtarget = 168 kts (TAS 175 ish --> GS 135).
No surprise the bus in-trail would catch up by 1 mile by the time he descend from 1300 ft to the threshold (2 mins at 3 deg standard 700 fpm).
If I could see the situation unfolding, my choice is to speed select Vref + 5 (ATHR) + 5 (pilot) and keep going. At one point the headwind disappears but A/THR should catch-up well inside the 10 kt margin prepared.
Yes, I had a TGV overtake me before the Airbus time.
