Internal Time and Phase Synchronization for Distributed Micro-Satellite SAR

Author

Gong, Xiaochun ; Xu, Guodong

Author_Institution

Res. Center of Satellite Technol., Harbin Inst. of Technol.

fYear

2006

fDate

16-19 Oct. 2006

Firstpage

1

Lastpage

4

Abstract

Tight synchronization among micro-satellites is one of key technical requirement for distributed micro-satellite SAR (DMS). Currently, time and phase synchronization solutions are considered separately. This paper first discusses influence of SAR caused by time and phase skew, and dictates requirements of synchronization for DMS. Then an integrative solution of time and phase synchronization is proposed with phase lock loop (PLL) and two-way time transfer. Based on micro-satellite architecture, the solution chooses to design individual transceiver, and implements time synchronization of the onboard computer (OBC) instead of effective load radar transceiver, which will facilitate the implementation of global command and data handling (C&DH) system schedules for DMS. Its internal synchronization characteristic also guarantees autonomy and robust of synchronization of DMS

Keywords

phase locked loops; spaceborne radar; synchronisation; transceivers; C&DH; DMS; OBC; PLL; distributed microsatellite SAR; global command-data handling system; onboard computer; phase lock loop; radar transceiver; synchronization; two-way time transfer; Calibration; Clocks; Distributed computing; Frequency synchronization; Global Positioning System; Phase locked loops; Robustness; Spaceborne radar; Stability; Transceivers; distributed micro-satellite SAR; onboard computer; time and phase synchronization;

fLanguage

English

Publisher

ieee

Conference_Titel

Radar, 2006. CIE '06. International Conference on

Conference_Location

Shanghai

Print_ISBN

0-7803-9582-4

Electronic_ISBN

0-7803-9583-2

Type

conf

DOI

10.1109/ICR.2006.343121

Filename

4148246