Status of the T2L2/Jason2 Experiment |
| |
Authors: | Pierre Exertier Etienne Samain Pascal Bonnefond Philippe Guillemot |
| |
Institution: | 1. UNS, CNRS-OCA, Geoscience Azur, avenue N. Copernic, F-06130 Grasse, France;2. CNES, avenue E. Belin, F-31055 Toulouse, France |
| |
Abstract: | The T2L2 (Time Transfer by Laser Link) project, developed by CNES and OCA will permit the synchronization of remote ultra stable clocks and the determination of their performances over intercontinental distances. The principle of the experiment derives from Satellite Laser Ranging (SLR) technology with dedicated space equipment. T2L2 was accepted in 2005 to be on board the Jason2 altimetry satellite. The payload consists of both event timer and photo detection modules. The system uses the ultra-stable quartz oscillator of DORIS as on-board reference clock on one hand, and the Laser Reflector Array, making T2L2 a real two-way time transfer system on the other hand. The expected time stability of the T2L2 instrument (detection and timing), referenced by the DORIS oscillator and including all internal error sources should be at the level of 10–12 ps at 1 s and <1 ps at 1000 s. The metrological specifications of T2L2 should permit to maintain a precision of 1 to a few ps when measuring the phase of a clock during around 1000 seconds. |
| |
Keywords: | Space geodesy Time transfer Satellite laser ranging DORIS |
本文献已被 ScienceDirect 等数据库收录! |
|