ժҪ ���һ��������������-��½��UHF(Ultra High Frequency)����ͨ����·�ĸ߾��Ȳ�ࡢ��ǵ��·���,ʵ�����ľ��ܶ�λ.�����Ʋ���ֱ����Ƶ��CCSDS(Consultative Committee for Space Date Systems) Proximity-1Э��ʵ������-��½��֮������ݽ���,����˫���첽����֡�������Ƶ����ʵ�־��ܲ��,������½��˫�����γɶ̻���ʵ�ֶ�����λ�ǵľ��ܲ���.���������ڲ���CCSDS Proximity-1Э��֡�ṹ��˫���첽����֡���ԭ����λ�ǵ��ز���λ��ָ������ԭ��,�Լ�����������½�ο�ϵ����������ȷ��λ�ķ���.�о�����,������ķ������ܼ��ɶȸߡ��ŵ���Դ�����ʸߡ��豸������ָ����������̽������������涨λ��ͨ����������.
To position the rover on lunar precisely, a new approach for ranging and measureing angle at high accuracy was presented by utilzing the ultra high frequency(UHF) communication link between rover and lander. In the position system, direct-sequence spread spectrum(DSSS) and consultative committee for space data systems(CCSDS) proximity-1 protocol were introduced for full-duplex data communication, precisely ranging of non-coherent mode was realized by DSSS moduled asynchronous transfer frame, azimuth of lunar was determinated by means of short baseline formed by the dual-antenna on lander. The format of version-3 transfer frame for precisely ranging, the principle of dual one-way ranging(DOWR) and azimuth interfere measurement by carrier phase were discussed at details, then the landing reference on lunar surface was constructed, therefore the approach of lunar position was deduced finally. For the advantage of the method presented, such as intergrated communication & position, more precise position, more efficient utilization rate of channel resources, lower power consumption, simply device structure, it is suitable for the task requirement of lunar rover exploration.