一种基于海上探空气象数据的大气折射率模型  

An Atmospheric Refractivity Model Based on Maritime Radiosonde Data

作　　者：王旭良[1] 戴正旭[1] 陈红英[1] 

机构地区：[1]中国卫星海上测控部,江苏江阴214431

出　　处：《飞行器测控学报》2015年第1期36-41,共6页Journal of Spacecraft TT&C Technology

摘　　要：针对测量船精度鉴定中电波折射经验模型修正精度较差的问题,在双指数大气折射率模型的基础上,通过对测量船历次任务的100多次探空气象数据进行处理,回归分析得到干项和湿项特征高度与海平面气象参数的关系式。试算结果表明:基于该模型用射线描迹法计算折射修正量,其计算精度与事后数据处理采用的计算方法相当,距离、仰角修正后的最大残余误差约为3%,满足了测量船在三大洋任意海域的精度鉴定需求。To solve the problem of poor correction accuracy of the experiential atmospheric refraction correction method used by instrumentation ships in accuracy validation, the relation between dry （wet） feature height and sea surface meteorological parameters is got by regression analysis, based on the dual-exponential model and more than 100 sets of radiosonde data. Trial computation shows that, using ray tracing method based on the new model to cal- culate the atmospheric refraction correction, the calculation accuracy is commensurate with post-processing methods. With approximately 3 % maximum residual error after range and elevation correction, the requirements of accuracy validation are met for operation of instrumentation ships in three major oceans.

关 键 词：大气折射误差 简化修正 双指数模型 探空气象数据 射线描迹法 

分 类 号：V557[航空宇航科学与技术—人机与环境工程] TN011[电子电信—物理电子学]