This paper proposes a day night clock difference experiment based on a geostationary satellite to distinguish between the predictions of the Natural Origin 7 framework of unified field theory and standard relativity on the question of first order solar direction clock effects. The observable is defined as the frequency difference of the same onboard oscillator when the same GEO satellite is in the sun facing phase and the anti solar phase. This single satellite single clock configuration helps suppress systematic effects associated with orbital height variation and inter satellite clock comparison. Standard relativity predicts cancellation of the first order solar term, leaving only a very small tidal level residual, whereas the current Natural Origin 7 framework allows a first order day night clock difference locked to the solar direction with a much larger magnitude. Because the two predictions differ by several orders of magnitude, the experiment is in principle testable with modern high precision frequency comparison technology. The paper focuses on the experimental configuration, order of magnitude estimate, and decision criterion, and presents a direct and executable test for the competing theoretical descriptions.
Zhang et al. (Sat,) studied this question.