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A new time and frequency transfer system compatible with BDS has been developed at NIM, and two of them are in operation at the BIPM since Jan 2017. Experiments with this equipment have been implemented to characterize the time and frequency transfer by BDS. This includes analysis of the satellites signal coverage statistics in the BIPM area, the error correction, the measurement noise of the NIM...
Since 2014 NIM has also started to design and develop one kind of homemade calibration system for the time link calibration on the basis of NIMTFGNSS-2 receiver. The system has been constructed preliminarily and calibrated, and in the near future, with this calibrator we might implement the calibration campaigns of some TAI links under the APMP(Asia Pacific Metrology Programme) scheme.
NIM has reconstructed UTC (NIM) since 2010 at new campus, and the official UTC (NIM) was switched to the new campus in October 2012. The new clock ensemble includes 6 Hydrogen masers and 7 Cesium clocks, with 1 Hydrogen maser and 2 Cesium clocks placed at the old campus. The master clock is a Hydrogen maser at new campus, and UTC (NIM) is generated from a micro phase stepper steered by a new algorithm...
UTC(NIM), which is developed and maintained by NIM, is the time and frequency primary standard in China. UTC(NIM) is generated originally by a clock ensemble, and is traced to UTC by participating in TAI cooperation with GNSS time and frequency transfer methods. TWSTFT earth station has been established at NIM new campus to join the Europe–Asia link. In this paper, the new development on the realization...
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