2026-10-04: conspiracyoflight.com (Doug Marett)

Query: Google "A. G. Kelly" Sagnac "uniform motion" (first hit), then conspiracyoflight.com Michelson-Gale Marett Kelly. URL: http://www.conspiracyoflight.com/Michelson-Gale/Michelson-Gale.html (Doug Marett, 2010). Result: positive (related work citing Kelly).

Found [web]

Marett recomputes Michelson-Gale: rectangle 612.65 m x 339.24 m = 207,840 m², latitude 41°46', λ = 570 nm, giving an expected 0.2364 fringe against the measured 0.230 ± 0.005. He states the result means "the speed of light is constant in the non-rotating frame", consistent with Lorentz ether theory and with Earth-Centred Inertial (ECI) preferred-frame theories.
He notes that Michelson and Gale's Part I calculation uses side length times tangential speed, "similar to Ruyong Wang's Δt = 2vl/c²" for the linear FOG.
"As A.G. Kelly points out, there is no such thing as a perfect inertial frame - almost all motions in the universe involve some degree of rotation" (citing Kelly, "The Sagnac Effect and Uniform Motion"). He also cites Wang's FOC result and Klauber (1999) on non-time-orthogonality of rotating frames.
Marett's own experimental Sagnac work: vixra 1506.0002 (single-mode fibre Sagnac interferometer, 2015); "Detecting Earth's rotation through space using a large area Sagnac interferometer" (2011); "The Sagnac Effect: Does it Contradict Relativity?" (General Science Journal 5993, 2012/2015).
He cites Schreiber et al. 2003 (ring lasers detect the sidereal, not solar, day; CERN record 749229).

Claim 4 (Michelson-Gale as an ordinary Sagnac test via the projected area, sin(latitude)): an independent re-derivation of the 0.236 prediction matching Kelly's figure.
Claims 1 and 2: Marett links Kelly and Wang as a line of argument. The ECI-frame point matches Kelly's Monograph 2 principle (light follows the Earth's orbit, not its spin).
Marett is an amateur experimenter (the experiments and article are his own, with his own interpretation); he is not a party with a commercial stake.