Clock synchronization experiment in India using Symphonie satellite (original) (raw)

1979

Abstract

A recent clock synchronization experiment between the National Physical Laboratory (NPL), New Delhi, and Space Applications Center (SAC), Ahmedabed, via the geostationary satellite Symphonie-II stationed at 49 deg E longitude, is reported. Since only one satellite transponder was available for this experiment, the two-way transmission of the clock pulses was carried out by switching the transmit-receive roles at the two stations at 5 minute intervals to achieve a nearly simultaneous two-way transmission. Taking into account all additional delays, the results demonstrated a clock-synchronization accuracy of better than 0.5 microsecond. A crystal-based portable clock flown aboard an aircraft confirmed this clock-synchronization to within a microsecond.

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