Not entirely related, but a fun and interesting tangent: There's actually no way that we know of to measure the "one-way" speed of light, as the specific synchronization that you use (and this post uses to do its calculation) assumes that the speed of light is the same in both directions. For all we know, light travels infinitely quickly in one direction and at c/2 in the return direction.
https://en.wikipedia.org/wiki/One-way_speed_of_light
recent-ish video about this: https://www.youtube.com/watch?v=pTn6Ewhb27k