GPS Block IIF卫星频间钟差偏差分析  

ANALYSIS OF INTER-FREQUENCY CLOCK BIAS FOR GPS BLOCK IIF SATELLITES

作　　者：李黎[1] 李浩军[2] 龙四春[1] 张立亚[1] 

机构地区：[1]湖南科技大学煤炭资源清洁利用与矿山环境保护湖南省重点实验室,湘潭411201 [2]中国科学院上海天文台,上海200030

出　　处：《大地测量与地球动力学》2014年第3期169-172,共4页Journal of Geodesy and Geodynamics

基　　金：国家自然科学基金项目(41304029;41204034);湖南省教育厅科学研究项目(12C0105);湖南省科技计划项目(2012FJ4271);广西科学研究计划项目(桂科能1207115-21);大地测量与地球动力学国家重点实验室基金项目(SKLGED2014-5-3-E)

摘　　要：使用37个IGS站的实测数据解算了4颗在轨Block IIF卫星(PRN01、PRN24、PRN25、PRN27)的IFCB值并进行特性分析。结果表明,目前所有GPS Blcok IIF卫星三频信号间存在的IFCB量级在cm到dm级;快速解算方法比非差估计方法更加省时高效;12、6、8、4 h的周期组合模型能较好地描述IFCB的变化,精度可达cm级;现有的IFCB计算方法、模型也适用于所有的Block IIF卫星。The inconsistency of three frequency carrier phases of Block IIF satellites （PRN01 with PRN25 ） causes difference between the satellite clock biases （SCBs）derived from L1/L2-based ionosphere-free linear combination and the SCBs obtained from L1/L5-based ionosphere-free linear combination. The SCBs＇ inconsistency between L1/L2 and L1/L5 is called inter-frequency clock biases （IFCBs）. IFCBs of Block IIF satellites （PRN01, PRN24, PRN25, PRN27）were obtained by processing the data from 37 IGS network stations. Analysis for the features of these IFCBs indicates： 1 ）The epoch-differenced method is more efficient than the undifferenced one ;2）All the Block IIF satellites exist apparent IFCBs,whose magnitude are approximately in centimeter to decimeter ;3 ）The periods of 12,6,8 and 4 h can describe the IFCBs＇ periodic variation better than other period groups. 4）The model is also suitble for PRN24 and PRN27 Block IIF satellites.

关 键 词：精密单点定位 三频信号 频间钟差偏差 BLOCK IIF卫星 历元间差分 

分 类 号：P228.41[天文地球—大地测量学与测量工程]