摘要
针对现有对流层大气折射模型在特定地区适应性不强的问题,基于电波大气折射效应原理及经典大气模型,分析了对流层大气折射误差估计模型及其投影函数,用历史气象数据分析了某地区气候特点,证明了修正模型在该地区应用的可行性。然后,利用多项式拟合方法得到了深空站地区大气折射统计模型,利用非线性回归方法得到了深空站地区大气折射修正量的解析近似模型。最后,用实测数据对以上两个修正模型进行了试验验证。验证结果表明,统计模型稳定可靠,解析近似模型测量精度高,能够满足不同条件下深空测控及VLBI观测中电波折射修正的需求。
The current global tropospheric refractive correction models are not applicable in certain regions,so a new model was proposed in this paper.First,the algorithms and models of the atmos-pheric delay were introduced.The model of the neutral atmospheric delay and the mapping function were analyzed.By using historical meteorological data,climatic characteristics of the deep space station were analyzed.Then,the new models of atmospheric delay in deep space station were ob-tained using polynomial fitting method and nonlinear regression method.In the end,experiments were carried out to test the above correction models.The results showed that the models were stable and reliable,and the accuracy of the models was high enough to meet the demands of deep space ex-plorations and the VLBI observations in different conditions.
作者
陈永强
喻学明
庞然
张卓
张雷
CHEN Yongqiang;YU Xueming;PANG Ran;ZHANG Zhuo;ZHANG Lei(Xi'an Satellite Control Center,Kashgar 844000,China)
出处
《载人航天》
CSCD
北大核心
2018年第2期260-266,共7页
Manned Spaceflight
基金
国家自然科学基金(61603008)
关键词
对流层折射修正
深空站
建模和试验验证
非线性回归
Tropospheric delay correction
deep space station
model development and validation
nonlinear regression
