Title :
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.
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;
Conference_Titel :
Radar, 2006. CIE '06. International Conference on
Conference_Location :
Shanghai
Print_ISBN :
0-7803-9582-4
Electronic_ISBN :
0-7803-9583-2
DOI :
10.1109/ICR.2006.343121
