Oh dear Harry, I assume that your post is supposed to be funny (?)
I judged the stabilisation of the approach by the fact that the 737 had obviously crossed the airfield perimeter, I was stationary at the holding point perhaps 200 meters away, my TCAS was in TA/RA and showed it as a yellow circle with +100ft appended and his wings were far from level.
Did I need to go through all of this ? Anyway, sufficient subjective evidence I feel.
My employer, NASA or otherwise is irrelevant.
Love to you all,
MoT