The limited sensitivity of present pulsar surveys and the greater frequencydrift make the more distant pulsars difficult to observe.
目前脉冲星普查的有限探测灵敏度和大的频率漂移，使我们难以观测到更遥远的脉冲星。
2
The clock offset and frequencydrift rate for sensor nodes are estimated and then compensated by using the time-stamp recorded in two adjacent synchronizations.
该算法利用连续两次同步过程中所记录的时间信息来估算节点时钟的偏移和频率漂移率，并进行补偿。
3
The phase detecting error caused by local oscillator frequencydrift and non-synchronization of measurement signal and gate signal is eliminated and the measurement speed is improved at the same time.