低高度角大气静力学延迟修正的改进

发布时间：2018-12-27 17:49

【摘要】：进行低高度角观测是GPS(Global Positioning System)气象学的发展趋势,其中发展高精度的低高度角的大气静力学延迟修正是主要的关键技术.比较了3种计算无线电波从空间到地面接收机的大气静力学延迟修正方法:(1)在大气球对称假设下用探空气球资料路径积分得到大气静力学延迟;(2)在大气球对称假设下用NCEP(National Centers for Environmental Prediction)再分析资料得到大气静力学延迟;(3)用Niell的大气静力学映射函数得到大气静力学延迟.与2001年中国地区89个探空气球站资料计算得到的大气静力学映射函数比较结果显示:NCEP再分析资料路径积分的方法在低高度角(5°以下)的精度好于Niell映射函数模型约5倍.
[Abstract]:Low altitude angle observation is the development trend of GPS (Global Positioning System) meteorology, among which the development of high precision atmospheric statics delay correction at low altitude angle is the main key technology. Three methods for calculating atmospheric statics delay from space to ground receiver are compared. (1) Atmospheric statics delay is obtained by the path integral of sounding balloon data under the assumption of large balloon symmetry; (2) Atmospheric statics delay is obtained by using NCEP (National Centers for Environmental Prediction) reanalysis data under the large balloon symmetry hypothesis, and (3) atmospheric statics delay is obtained by using Niell's atmospheric statics mapping function. Compared with the atmospheric static mapping function calculated from the data of 89 sounding balloon stations in China in 2001, the results show that the accuracy of the path integral method of NCEP reanalysis data is about 5 times higher than that of the Niell mapping function model at low altitude angle (below 5 掳).
【作者单位】：中国气象科学研究院;中国气象局成都高原气象研究所;中国科学院上海天文台;上海市卫星遥感与测量应用中心;
【基金】：国家自然科学基金项目(40605012) 地球空间环境与大地测量教育部重点实验室开放基金资助项目(07-07) 灾害天气国家重点实验室开放课题(2009LASW-B10) 成都高原气象研究所开放课题(LPM2009013)资助
【分类号】：P126

【共引文献】