CAJ | 학술논문

论述了卫星双向时间比对原理和比对系统中各项系统误差。计算出同步卫星运动导致的时间延迟误差、地球自转效应(Sagnac)误差和地面站设备时延误差。在所有误差项中，地面站户外单元设备是最大的误差来源，这个值与环境温度是强相关的，且存在反比关系，温度系数达到-0.1 ns/℃。对此，可通过温度控制或对数据的温度补偿来降低误差。在对所有误差项进行综合计算后，得出比对误差可低于2 ns。
논술료위성쌍향시간비대원리화비대계통중각항계통오차。계산출동보위성운동도치적시간연지오차、지구자전효응(Sagnac)오차화지면참설비시연오차。재소유오차항중，지면참호외단원설비시최대적오차래원，저개치여배경온도시강상관적，차존재반비관계，온도계수체도-0.1 ns/℃。대차，가통과온도공제혹대수거적온도보상래강저오차。재대소유오차항진행종합계산후，득출비대오차가저우2 ns。
The two-way satellite time transfer(TWSTT) and its systematic errors are discussed in detail, especially the motion of satellite results in time delay errors and Sagnac effect error. About the equipment in stations, such as, transmitter and receiver, main errors come from them, the time delay depends on its ambient temperature. The temperature coefficient is as high as -0.1 ns/℃. Therefore, it is necessary to reduce the error by the temperature control or temperature compensation of the data. At the end, we synthesize the results and obtain the error being less than 2 ns.