东南大学学报（自然科学版）Issue(z2)：433-439,7.DOI:10.3969/j.issn.1001-0505.2013.S2.046
基于区域 CORS 多基站联合解算的精密卫星钟差实时估计
Determination of real-time precise satellite clock offset based on multiple reference stations using regional CORS
摘要
Abstract
In order to improve the accuracy and timeliness of real-time precise point positioning, by means of GPS ( global positioning system) carrier phase observations collected in a regional CORS ( continuous operational reference system) network and the IGU ( international global navigation sat-ellite system service ultrarapid ) predicted ephemeris, the computation of real-time precise satellite clock offsets based on epoch-difference and satellite-difference technology is quickly realized by the method of joint calculations with multiple reference stations.The clock sequence is compared with the products provided by IGS ( international global navigation satellite system service) analysis cen-ters, and the influence of different station distributions and numbers of stations on the clock offset determination is also studied.The experimental results indicate that the real-time precise satellite clock products calculated by the proposed algorithm are equal to IGS final products.The estimation accuracy of relative satellite clock offsets can be achieved 0.08 ns, and their average standard devia-tion is 46.2 ps;the estimation error of satellite clock offsets is basically within 0.2 ns, and the aver-age standard deviation is 73 .2 ps.In addition, the spatial correlativity among tropospheric delay parameters can be effectively reduced by increasing the station spacing, and on the premise of ensu-ring the observation accuracy and computation speed, the clock estimation accuracy can be further enhanced by a reasonable increase in the number of stations.The algorithm has a smaller amount of arithmetic operations and a faster computation speed, and more accurate real-time satellite clock products can be quickly obtained with GPS carrier phase observations provided by only a small num-ber of reference stations.关键词
钟差估计/星间/历元间差分/实时精密单点定位/区域CORS/多参考站Key words
clock estimation/epoch-difference and satellite-difference/real-time precise point posi-tioning/regional CORS ( continuous operational reference system)/multiple reference stations分类
天文与地球科学引用本文复制引用
夏炎,高成发,潘树国,陈伟荣,高旺..基于区域 CORS 多基站联合解算的精密卫星钟差实时估计[J].东南大学学报（自然科学版）,2013,(z2):433-439,7.基金项目
“十二五”国家科技支撑计划重点资助项目（2012BAJ23B01）． （）
