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).
Time transfer by laser link: a complete analysis of the uncertainty budget
Metrologia ; 52 , 2 ; 423-432
2015
10 Seiten, 35 Quellen
Article (Journal)
English
Laser , Metrologie , Cover-Faktor , Pikosekunde , Standort
(T2L2) Time Transfer by Laser Link
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