结合IGS分析中心产品的轨道综合算法及其精度分析  

Studies of the Orbit Combination and Its Precision Evaluation Based on the Production of IGS Analysis Center

作　　者：陆轶材 高成发[1] 郭奇 LU Yicai;GAO Chengfa;GUO Qi(School of Transportation, Southeast University, Nanjing 210096, China)

机构地区：[1]东南大学交通学院,江苏南京210096

出　　处：《测绘通报》2018年第5期11-15,34,共6页Bulletin of Surveying and Mapping

基　　金：江苏省自然科学基金(BK20171353)

摘　　要：鉴于IGS分析中心的框架及轨道产品趋于稳定,提出了基于IGS分析中心产品的轨道综合算法。利用自编算法对IGS各分析中心2017年2月26日—2017年4月8日精密轨道进行综合,获得GPS综合轨道。结果表明,IGS进行轨道综合的9个分析中心中,NGS、GFZ、CODE和ESA 4个分析中心的轨道产品精度相对较好,剩余5个分析中心的轨道产品相对较差;各分析中心与IGS发布的综合轨道间存在框架差异性;使用本文算法计算得到的合成轨道结果与IGS综合轨道作比较,二者三维差异小于5 mm,优于快速星历,证明了本文算法的可行性。In view of the stability of the framework and orbital products of IGS Analysis Center,an integrated trajectory algorithm based on IGS Analysis Center product is proposed.The self-assembly algorithm is used to synthesize the precision orbit of IGS Analysis Center from GPS week 1938 to 1944 and obtain GPS combination orbit.Experimental results shows that in all of Analysis Center,NGS,GFZ,CODE and ESA have better accuracy on their orbit products,while the remaining relatively poor. And it is proved that there are frame differences between the Analysis Center orbit and the final orbit presented by IGS.Compared with IGS final orbit,the difference of 3 D RMS on combined orbit are less than 5 mm.The feasibility of this algorithm is proved by using the algorithm in paper.

关 键 词：轨道综合 IGS产品 精度分析 

分 类 号：P228[天文地球—大地测量学与测量工程]