【摘要】 讨论了陕西天文台卫星电视传递时间频率系统所测得的时延值变化特性，依据实测数值给出时延值日变化的模式并与实际结果做了比较．把连续６天这个模式的结果再进行二次多项式回归．可以预报后６天的时延值，精度为几微秒．更多还原

【Abstract】 n this paper we discussed the character of measured values of time singnal of CCTV via satellite,the precision of time delay by measurement is 15ns, which is equivalent to 5m in precision of range measuring. The fitting function of daily range of time delay was derived and was used for comparison with measured values. Coefficients of function were fitted by secondary polynomial, then the use of results for six days may forecast the values of time delay for next six days.The precision of several μs in ranging can be reached.更多还原