A double difference measuring method of pseudo-range precision using to the real environment
会议名称：《第三届中国卫星导航学术年会》
会议日期：2012年
学科分类：08[工学] 080401[工学-精密仪器及机械] 081105[工学-导航、制导与控制] 0804[工学-仪器科学与技术] 0825[工学-航空宇航科学与技术] 0811[工学-控制科学与工程]
关 键 词：double difference pseudo-range measure precision real environment positioning precision
摘 要：The pseudo-range measurement precision is an important index for evaluating the performance of a navigation receiver, and also one of the important factors for analyzing the receiver’s positioning precision. In the real environment the pseudo-range is varying and it is difficult to measure its precision, so usually the pseudo-range precision is measured on a laboratory simulation condition. But this measuring method could not truly reflect the pseudo-range precision in the real environment. In this paper, a measuring method of pseudo-range precision using to the real environment, namely receiver and satellite double difference method, is presented. Its theory basis is given by deducing its mathematic model, and then experiment is made on pseudo-range precision measuring with this method. The results of the experiment show that when the receiver is stationary, this method can accurately measure the precision of its observation pseudo-range to a static satellite, and can accurately measure the precision of its observation pseu-do-range to a motional satellite by controlling the observation time. Finally the obtained pseudo-range precisions are used to compare the precisions of two posi-tioning modes, and the comparison relationship of the precisions of the two posi-tioning modes observed in the real data is intuitively revealed.