Perspectives of Time and Frequency Transfer via Satellite

8th Symposium on Frequency Standards and Metrology 2015

Schäfer, W.^1 ; Feldmann, T.^1

TimeTech GmbH, Stuttgart

D-70563, Germany^1

关键词: Atomic clock ensemble in spaces;    Frequency transfer;    Key characteristics;    On board equipments;    Orbit determination;    Time and frequencies;    Time and frequency transfers;    Two-way satellite time and frequency transfers;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/723/1/012038/pdf
DOI  :  10.1088/1742-6596/723/1/012038

来源: IOP

【 摘 要 】

This paper reviews key characteristics and requirements for Two-Way Satellite Time and Frequency Transfer (TWSTFT) links. The outline and perspective of two concepts are described: 1. The classical bend-pipe transponder, without special equipment on board, with the potential of 10-17/day frequency transfer uncertainty; 2. The ACES-MWL (Atomic Clock Ensemble in Space Microwave Link) like active on-board equipment, with the potential down to few 10-19/day, using both high-rate modulation and carrier-phase. An outlook to advanced links is given. The aim of these proposed links is to provide a unique platform for the demanding requirements in the field of time and frequency metrology and to support improved orbit determination and relativistic geodesy for the next decades.