多通道时间传递接收机NTSCGPS-1的研制与测试

近20年来，GPS共视(GPS CV)技术作为一种主要技术被用于TAI时间比对。GPS时间传递接收机是进行GPSCV时间比对的主要设备。介绍了中科院国家授时中心采用Motorola VP Oncore GPS OEM板、GT200计数器研发的高精度、多通道GIPS时间传递接收机NTscGPS-1的原理和特点。并通过实际观测数据分析，认为NTSCGPS-1的观测噪声水平与其它时间传递接收机相当，并有较好的兼客性。

The development of multi-channel GPS time transfer receiver

Accurate time metrology depends mainly on the performance of the frequency standards used, the quality of the time and frequency synchronization. GPS common-view hasbeen the principal technique for remote time and frequency comparison since 1990s. The NTSCGPS-1, a multi-channel GPS time transfer receiver developed in NTSC (National Time Service Center) using VP Oncore GPS OEM board and GT200 time interval counter is introduced in this paper. Some results of common-view comparison using NTSCGPS-1 and data analysis have shown that the NTSCGPS-1 receiver has the same noise level as the GPS time transfer receivers used nowadays all over the world.