Remote Calibration of Time Scale Difference by Moving a Portable Cesium Clock

In this paper, we introduce a cost-effective calibration procedure of moving a portable cesium clock to meet the requirements of remote time-scale calibration in Taiwan. By setting some reasonable limits, e.g., a limit of 30 hours allowed for the elapsed round-trip time, the expanded time uncertainty with a coverage factor of $\mathrm{k}=2$ is estimated as 7.36 ns for the calibration. The procedure also allows us to complete a calibration trip between TL and one of the most laboratories in the western part of Taiwan with a car.