What is Sagnac effect GPS?
What is Sagnac effect GPS? The Sagnac effect depends on the path and direction travelled by the GPS receiver (rotating frame of reference). The effect basically means that the onboard GPS clock runs fast or slow relative to a clock on the geoid (Earth's equipotential surface). This correction is also applied in the receiver. What causes the Sagnac effect? Wikipedia explains the Sagnac effect as a result of the rotating disk, which moves the target so that one of the light beams has farther to travel and consequently, will arrive later than the other light beam which goes around the...