One-way light speed measurement using the synchronized clocks of the global positioning system (GPS)

Abstract

The one-way speed of light is determined by timing a light signal transmission using the synchronized clocks of the global positioning system. The measurement is based on the clock synchronization procedure established by the CCIR that has been rigorously and extensively tested and verified. The result is a simple method for light speed determination that reveals one-way light speed anisotropy depending on the direction of propagation relative to the rotating Earth.Résumé: La vitesse de la lumière unidirectionnelle est définie en mesurant la transmission d'un signal lumineux en utilisant les horloges synchronisées du système de localisation GPS. La mesure est basée sur la procédure de synchronisation par rapport à l'horloge définie par le CCIR qui a été rigoureusement et largement testée et vérifiée. Le résultat est une méthode simple pour définir la vitesse de la lumière qui révèle une anisotropie de la vitesse de la lumière unidirectionnelle dépendant de la direction de la propagation par rapport à la rotation de la Terre.

GPS and the One-Way Speed of Light

“…The GPS data available in (10) also shows that a signal sent westward travels at speed c plus the rotational speed of the Earth v at that latitude giving cv  . These generalized results were first reported by Gift [21].…”

“…The range equation data also shows in (42) that a signal sent westward travels at speed c plus the rotational speed of the Earth v at that latitude giving cv  . This is true for the short-distance travel in the approximately inertial frame considered here as well as long-distance circumnavigation of the Earth [19] and fully corroborates the light speed determined in section 3 using the synchronized GPS clocks [21].…”

Relativity, Magnetic Charge, and Weak Bosons Mass

“…This form of transformation is already known, and there will be a difference with Lorentz transformation when measuring one-way light propagation, so called aether drift; although the flux is no static aether in the Lorentz sense. Several experimenters report positive confirmation: Marmet (2004), Gift (2010Gift ( , 2012; Selleri (2004) concludes with similar ideas.…”

Light Transmission and the Sagnac Effect on the Rotating Earth

“…The accepted interpretation is that light speed is constant in GPS clock synchronization but a time adjustment sometimes referred to as the "Sagnac correction" is necessary because of the Earth's rotation. Similar to the case of light speed constancy in a rotating frame, this interpretation has been subject to challenge (Marmet, 2000;Kelly, 2005;Gift, 2010Gift, , 2011Wang, 2000;Hatch, 2007;Sato, 2010). Marmet (2000) and Kelley (2005) have argued that observed travel time differences in the GPS for east-west light transmission is evidence of light speed anisotropy and Gift has supported this using the rigorously verified GPS clock synchronization algorithm (Gift, 2010) and the GPS range equation (Gift, 2011).…”

“…Similar to the case of light speed constancy in a rotating frame, this interpretation has been subject to challenge (Marmet, 2000;Kelly, 2005;Gift, 2010Gift, , 2011Wang, 2000;Hatch, 2007;Sato, 2010). Marmet (2000) and Kelley (2005) have argued that observed travel time differences in the GPS for east-west light transmission is evidence of light speed anisotropy and Gift has supported this using the rigorously verified GPS clock synchronization algorithm (Gift, 2010) and the GPS range equation (Gift, 2011). Hayden (1991) previously arrived at this same conclusion after considering several experiments including Sagnac, Michelson-Gale and Brillet-Hall.…”