-An Echo measured at the Grand Canyon fits the formula t = [2L] / c. But this is only valid in light of the fact that a thin layer of air molecules (atmosphere / medium) is being dragged by the surface of the Earth (like a dimpled golf ball) as it hurtles through interstellar space. If this layer were at rest relative to the Earth, then this would allow a new definition of relativity to emerge based on a new Echo formula:

♦ T = [(L - vt₁) / c] + [(L + vt₂) / c ] = [2Lc] / (c²-v²)

-This Echo formula is the key element of my hypothesis. It comes from the Michelson-Morley interferometer experiment to detect the Aether. The source of the wave and the reflection from a distant object are at rest relative to each other; but the tandem they form is in motion relative to the medium. This is the underlying idea that I am trying to exploit in this hypothesis.