Time transfer by laser link: a complete analysis of the uncertainty budget
Time transfer by laser link: a complete analysis of the uncertainty budget
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DOI：
10.1088/0026-1394/52/2/423
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发表时间：
2015-04
期刊：
影响因子：
2.4
通讯作者：
E. Samain;P. Exertier;C. Courde;P. Fridelance;P. Guillemot;M. Laas-Bourez;J. Torre
中科院分区：
文献类型：
--
作者：
E. Samain;P. Exertier;C. Courde;P. Fridelance;P. Guillemot;M. Laas-Bourez;J. Torre
Jason 2号卫星上的激光时间传递实验（T2L2）是一项允许在皮秒级进行远程时钟同步的使命。它以激光测距技术为基础，地面有一个激光站网络，卫星上有一个专用仪器。它于2008年6月启动，自那时以来一直在持续工作。T2L2的性能对于时间和频率计量以及基础物理学来说是非常有前途的。整个实验的科学目标依赖于严格的不确定性预算。这取决于空间仪器和激光站网络的特性、地面上进行的后处理以及用于校准激光站的过程。的不确定性预算表明，T2L2是能够执行远程站点之间的扩展不确定性优于140 ps（覆盖因子= 2）的共视时间传输。
The Time Transfer by Laser Experiment (T2L2) on the Jason 2 satellite is a mission allowing remote clocks synchronization at the picosecond level. It is based on laser ranging technologies, with a laser station network on the ground and a dedicated instrument on board the satellite. It was launched in June 2008 and has been working continuously since then. T2L2 performances are very promising for time and frequency metrology and also for fundamental physics. The scientific objectives of the whole experiment rely on a rigorous uncertainty budget. This is governed by the characteristics of the space instrument and the laser stations network, the post treatment done on the ground, and also the process used to calibrate the laser stations. The uncertainty budget demonstrates that T2L2 is able to perform common-view time transfers between remote sites with an expanded uncertainty better than 140 ps (coverage factor = 2).