利用三频组合观测值的GPS周跳探测与修复  

GPS cycle-slip detection and repairing using triple-frequency combination observations

作　　者：刘胜男 黄张裕[2] 彭磊[2] 凌晨阳[2] 

机构地区：[1]常州建设高等职业技术学校,江苏常州213016 [2]河海大学地球科学与工程学院,南京210098

出　　处：《测绘科学》2012年第5期46-48,共3页Science of Surveying and Mapping

摘　　要：本文分析了GPS三频组合观测值在波长、电离层误差和偶然误差等方面的特性,并定义了衡量其特性的3种指标;结合传统的伪距/相位组合法,探讨了三频组合观测值探测与修复周跳的原理和方法。利用模拟的L5观测数据,进行了多种情况下周跳的探测与修复。结果表明:该方法能在单历元间准确探测出各个频率上发生的大、小不等的周跳。相对于原始观测值,长波长的三频组合观测值可以更有效地探测与修复周跳。On the basis of the modernization of the GPS signals, the third frequency L5 has been added. In order to detect and re- pair cycle slips more effectively, the characteristics of triple-frequency combination observations in the wavelength, ionosphere error and accident error were discussed and three indicators were defined to evaluate the characteristics. The principle of detecting and repai- ring cycle slips was discussed using the triple-frequency combination observations, combined with the traditional pseudo-range/carrier phase combination method. The simulated L5 observation was used to detect and repair the cycle-slip in different conditions. The result showed that the method could not only detect large cycle slips but also small cycle slips in each frequency at single epoch precisely and effectively. Compared with the original observations, the triple-frequency combination observations could detect and repair cycle slips more effectively.

关 键 词：GPS 三频组合观测值 周跳探测 伪距/相位组合法 

分 类 号：P228.4[天文地球—大地测量学与测量工程]