Joint Dual-Orbit Validation Using BeiDou GEO and GPS MEO: Unified Field Theory Satellite Day–Night Clock-Bias Prediction Strongly Confirmed by Measurements

This study performs a dual orbit verification of the NO7 unified field framework using publicly archived GNSS precise products from IGS MGEX and NASA CDDIS. We analyze BeiDou geostationary satellites and GPS medium earth orbit satellites with local solar time alignment for noon and midnight windows, and cross check results with two independent analysis center products to reduce single center bias. A robust 24 hour solar phase locked diurnal signal is found in BeiDou GEO clock estimates, showing a peak to peak amplitude of about 34.45 ns with a consistent phase pattern of slower clocks near local noon and faster clocks near local midnight. For GPS MEO, the raw series is strongly contaminated by orbital harmonics; after removing the dominant 12 hour and higher order components via multi period harmonic decomposition, the recovered 24 hour solar locked component is about 21.97 ns, matching the predicted orbit dependent scaling. Across both orbit types, the signal exhibits coherent phase behavior and magnitude scaling with geocentric radius, and it is far above the near cancelation level expected under the standard relativistic treatment of the solar first order contribution. The work provides a reproducible, public data based test protocol and an orbit cross validated evidence chain for the reported solar locked diurnal clock term.