you're sitting in a box that has no windows in deep space. Can you say with absolute certainty that box is not moving at a constant velocity ?When you write "subject to an unknown velocity vector" you seem to be under the impression that there is some absolute frame under which we could have such a velocity vector. Even in "Gallilean relativity" there is no such frame. Every object has 0 velocity relative to itself. If that is not what you mean, the "unknown velocity vector" is relative to what?
I dont care what it is relative to. My mission is to find that velocity. Ill burn all other bridges when and if they come
If I was to go out on a limb and say what it is relative to, I would say it is relative to the center of a strobe photon wave front, which appears to me, as the speed of light is invariant, regardless of the observations of any observer, to have no horizontal or vertical displacement in (x,y,z,t) , for billions of years. That point cannot move as it must always be the same distance from any three photons in the wave front, for all time . Further as photons are not ballistic that point, and the photons in the wave front are unaffected by the movement of any other entity.
if any observer was to observe that point move, or moving, they would have to conclude that the speed of light is not invariant or alternatively that they are moving, and the point is not , which is a pretty stark choice
if anyone was to propose that that point moves they would have to concede that the speed of light is variant as that point would now be closer to some photons in the wave front and further from others.
As photons are non ballistic in nature if one was to propose that that point moved, the photons in the wave front would not move with it, so again the result is C is variant
it appears to me the point at the center of a strobe photon wave front is stationary in an absolute sense.
I simply dreamt up a way of placing a tangible object at that point.