摘要
利用多种插值方法对GPS导航卫星钟差进行插值,通过与IGS(international GPS service)发布的事后精密钟差作比较,分析插值方法的特点与适用性;利用线性模型(linear model,LM)、二次多项式模型(polynomial model,PM)、灰色模型GM(1,1)对精密钟差进行预报,与IGS最终精密钟差相比可达到ns级精度,并分析了基础数据和预报时长对预报效果的影响。
This paper analyses the characteristicsof interpolation methodsand probes itsapplicability byinterpolating clock bias of GPS navigation satelliteswith multiple interpolation methods and comparing and contrasting the post-issued by IGS.The linear model,quadratic polynomial model and Grey model(1,1)are also used to forecast precision clock biasand results show that these models can reach the ns level.The influence of basic data and forecasting time on forecasting effect is analyzed in theend.
作者
袁俊军
孟瑞祖
YUAN Junjun;MNEG Ruizu(Surveying and Mapping Press,Beijing 100045,China;Beijing AeroImgInfo Technology Co.,Ltd.,Beijing 100195,China)
出处
《测绘地理信息》
2018年第5期64-67,共4页
Journal of Geomatics
基金
国家科学技术部基础工作专项资助项目(2015FY310200)
北京市科技计划资助项目(Z161100001616003)
中国测绘科学研究院基础业务资助项目(7771509)
关键词
GPS
精密钟差
插值
灰色模型
预报
GPS
precision clock bias
interpolation
gray model
forecast