GNSS单站授时系统性偏差分析

从单站授时基本观测方程出发，对引起系统性偏差的原因进行研究，结合具体实验分析卫星钟差和接收机硬件延迟对授时结果的影响。实验结果表明，卫星钟差引起的系统性偏差随时间变化，对所有测站影响相同；接收机硬件延迟会对授时结果造成系统性偏差影响，不同测站的系统性偏差不同，其大小取决于各自接收机硬件延迟的偏差，在进行授时及时间同步时应当加以改正；接收机硬件延迟不影响授时结果频率的稳定度，在进行频率传递时无需改正。

Analysis of Systematic Bias of Single Station Time Service

Starting from the basic equations of single station timing, we analyze the factors that cause systematic bias of timing results. Combining the specific experiments, the influence of satellite clock error and receiver hardware delay is analyzed and some useful conclusions are obtained. The systematic bias caused by satellite clock error for all stations changes with time. However, the systematic bias associated with results caused by the receiver code bias of various stations differs, depending entirely on the value of the different receiver code biases, so it should be corrected carefully in the timing and time synchronization. However, the receiver hardware delay does not affect the frequency stability of timing results, so there is no need to correct it in frequency transfer.