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�������պ����ѧѧ�� 2012, Vol. Issue (3) :335-339    DOI:
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�Ǽ�DOWRT�е������ЧӦ����������
���ij�, ����, ����, ��Ρ*
�������պ����ѧ ������Ϣ����ѧԺ, ���� 100191
Analysis and correction on relativistic effect of inter-satellites using dual one-way ranging/time synchronization
Sun Wenchao, Chang Qing, Xu Yong, Qi Wei*
School of Electronics and Information Engineering, Beijing University of Aeronautics and Astronautics, Beijing 100191, China

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ժҪ �Ƶ���˫�򵥳̲����ʱ��ͬ��(DOWRT,Dual One-Way Ranging/Time Synchronization)�Ľ����,�����˿ռ䶯̬��DOWRT���ļ��㷽���������ЧӦ�ڲ���ʱ��ȶ��е�Ӱ��,����˴��������ЧӦ������DOWRT�㷨,���ֱ��������˵͹��ӷ������Ǻ͵��������еľ�����ʱ��ͬ�������������ЧӦ��������.�������:���Ǽ����DOWRT��������ʱ,�������ЧӦ����ĵ͹�̻��߱�ӷ������Ǽ����������Ϊ�׼���ʱ��ͬ�����Ϊ��Ƥ�뼶,���ڵ���������������������׼�����������͸ߴ�΢�뼶��ʱ��ͬ�����.���Ϊ��ʵ�ֵ������Ǽ�߾��Ⱦ�����ʱ��ͬ������,������������ЧӦ����.
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Abstract�� The calculation of dual one-way ranging/time synchronization (DOWRT) between dynamic satellites was analyzed. In addition, relativistic effect on ranging/time synchronization was presented. A calculation with relativistic correction of DOWRT was proposed. Measurement errors of ranging/time synchronization in low earth orbit(LEO) formation constellation and in navigation constellation caused by relativistic effect were simulated and comparatively analyzed. Simulation results demonstrate that when inter-satellite DOWRT method is adopted, ranging measurement and time synchronization errors during LEO formation flying caused by relativistic effects are in meter-scale and sub-picosecond level respectively, while in navigation constellation measurement, the corresponding errors would be in hundred-meter scale and microsecond level. As a result, relativistic correction should be included in order to realize high-precision ranging and time synchronization measurement between navigation satellites.
Keywords�� dual one-way ranging/time synchronization(DOWRT)   navigation constellation   inter-satellite links   error analysis   general relativity     
Received 2010-11-30;
Fund:������Ȼ��ѧ����������Ŀ(60872062); ���Ҹ߼����о���չ�ƻ�("863"�ƻ�)������Ŀ(2007AA12Z336,2009AA12Z313); ����Ƽ��ص㴴�»���������Ŀ(2009-06)
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���ij�, ����, ����, ��Ρ.�Ǽ�DOWRT�е������ЧӦ����������[J]  �������պ����ѧѧ��, 2012,V(3): 335-339
Sun Wenchao, Chang Qing, Xu Yong, Qi Wei.Analysis and correction on relativistic effect of inter-satellites using dual one-way ranging/time synchronization[J]  JOURNAL OF BEIJING UNIVERSITY OF AERONAUTICS AND A, 2012,V(3): 335-339
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