The timedetermination data in Chinese Joint System in 1977—1978 are tested. Both the internal and the external precisions of so obtained joint corrections are higher.
用1977年和1978年我国测时资料进行试算，求得的综合时号改正数的内外精度都有所提高。
2
We theoretically discussed the synchronization sample gate timedetermination by considering the optimal Signal-to-Noise Ratio (SNR) where the background showed time-uniformity distribution.