TWSTFT站间钟差残差与测站环境温度的相关性分析  

Analysis of correlation between clock offset and environmental temperatures of stations for TWSTFT

作　　者：曹芬[1,2,3] 杨旭海[1,2] 李志刚[1,2] 杨颖[1,2,3] 孙保琪[1,2] 冯初刚[1,4] 

机构地区：[1]中国科学院国家授时中心,西安710600 [2]中国科学院精密导航定位与定时技术重点实验室,西安710600 [3]中国科学院大学,北京100039 [4]中国科学院上海天文台,上海200030

出　　处：《时间频率学报》2013年第3期148-155,共8页Journal of Time and Frequency

基　　金：国家自然科学基金重点资助项目(11033004);西部之光联合学者资助项目(2007LH01)

摘　　要：为了对卫星双向时间频率传递（TWSTFT）站间钟差残差与测站环境温度之间的关系进行分析，利用2005年6月的C波段TWSTFT的观测数据，对TWSTFT站间钟差残差与上海站、西安站的环境温度的相关系数进行了分析，并建立了联结TWSTFT站间钟差残差与测站环境温度的拟合函数。分析结果表明：测站环境温度对TWSTFT站问钟差残差的影响是明显的。对站间钟差残差进行温度拟合修正后，站间钟差残差RMS降低25％～50％。测站应该保持观测设备恒温，这对于C波段TWSTFT的站间时间同步具有特殊意义。For analyzing the correlation between the clock offset and the environmental temperatures of stations for TWSTFT（two-way satellite time frequency transfer）, the correlation coefficients between the clock offset and the environmental temperatures of stations for TWSTFT are calculated and analyzed, and a fitted function that relates the residual of clock offset with the environmental temperatures of stations is constructed by using the observation data of TWSTFT （in C-band, for Shanghai-Xi＇an link, during the June of 2005）. The results show that the environmental temperatures obviously affect the residuals of clock offset. The residuals of clock offset are revised with the fitted function and the RMS（root-mean-square） values of the revised residuals of clock offset reduce by 25%-50%. The observation devices should be kept in an environment with constant temperature, which is of special significance to the time synchronization between the stations for TWSTFT in C-band.

关 键 词：环境温度 卫星双向时间频率传递(TWSTFT) 钟差残差 相关系数 

分 类 号：P228.4[天文地球—大地测量学与测量工程]