北京地区对流层延迟模型的建立  

Establishment of tropospheric delay model for Beijing

作　　者：杨汀[1] 张筱[1] 宋福成[1] 陈宜金[1] 

机构地区：[1]中国矿业大学(北京),北京100083

出　　处：《测绘科学》2016年第4期165-170,共6页Science of Surveying and Mapping

摘　　要：针对气象参数具有时空特性导致全球导航卫星系统测量精度不高的问题,该文探讨了北京地区对流层延迟模型建立的方法。使用2012年探空气象数据,基于最小二乘法拟合出北京地区气压、温度、露点温度随高程变化的关系式,建立了3层干延迟折射率模型、2层湿延迟折射率模型及天顶延迟折射率模型(BJ模型);采用Bernese软件,将BJ模型与Saastamoinen模型和Hopfield模型进行精度比较,结果表明BJ模型的残差均值及均方根均优于传统模型;同时,以1月份和7月份的BJ模型为例计算得出的区域模型适用于不同年份。In traditional, the global zenith total delay （ZTD）model is used in regional GNSS survey- ing; it makes accuracy lower due to the spatiotemporal characteristics of meteorological parameters. For this reason, the ZTD model of different seasons in Beijing was proposed in this paper. The variations be- tween height and pressure, temperature, dew point temperature of Beijing were analyzed with sounding data in 2012 and the relations among those were derived by least square fitting algorithm. Combined with the above analyze, the three-layer dry delay model, two-layer wet delay model and ZTD model, namely BJ model, were determined. The Saastamoinen, Hopfi the zenith tropospheric delay by Bernese software, and provided by IGS. Results of experiments showed that th perior to others. Furthermore, the time applicability of eld and BJ model were separately applied to build computed the differences with the estimated values e residual mean and RMS of BJ model was both su- BJ model was also tested.

关 键 词：GNSS 气象参数 对流层天顶延迟 最小二乘拟合 BJ模型 

分 类 号：P228.4[天文地球—大地测量学与测量工程]