T2L2 on JASON-2: First Evaluation of the Flying Model
Abstract
The new generation of optical time transfer (T2L2: Time Transfer by Laser Link [1]) under development at OCA and CNES shall allow the synchronization of remote ultra-stable clocks and the determination of their performances over intercontinental distances. The principle is based on the propagation of light pulses between clocks for synchronization. T2L2 is the follow on mission to LASSO [2] (LAser Synchronization from Stationary Orbit) with performances improved by two orders of magnitude. A T2L2 payload shall be launched in mid 2008, together with the Jason-2 space vehicle dedicated to the observation of the oceans. A preliminary performance budget and a ground experiment conducted by the OCA permit to envision a performance improvement of at least one order of magnitude as compared to the best time transfer techniques available. Expected performances are in the 100 ps range for accuracy, with an ultimate stability better than 1 ps over 1000 s (one pass) and than 10 ps over 1 day. Time transfer performances in a common view mode are driven by the noise of both the ground and the onboard timers, whereas the performances in a non-common view configuration are limited by the onboard clock (DORIS USO). The main objectives of the T2L2 mission are technological (In-orbit functional and performance validation), scientific (Time & Frequency metrology and Fundamental physics tests), and a contribution to the Jason-2 core mission (Evaluation of the behaviors, versus radiations, of the DORIS USO).
Document Details
- Document Type
- Technical Report
- Publication Date
- Jan 01, 2007
- Accession Number
- ADA474265
Entities
People
- D. Albanese
- E. Samain
- F. Para
- I. Petitbon
- J. Weick
- J.-m. Torre
- P. Vrancken
- Ph. Guillemot
Organizations
- CNES