映射函数形式的天文大气折射理论公式

发布时间：2018-02-16 19:38

本文关键词： 中性大气折射延迟天文大气折射映射函数　出处：《地球物理学进展》2010年04期 　论文类型：期刊论文

【摘要】：重新研究了中性大气折射延迟映射函数的近似母函数.在此基础上,本文得到了一个新的天文大气折射的理论公式,即映射函数形式的表达式.数值计算表明,利用本文公式和利用普尔科沃大气折射表公式计算的蒙气差相差很小.在天顶距小于30°的情况下,二者之差小于0″.05,在天顶距小于65°的情况下,二者之差小于0″.11;在天顶距大于65°的情况下,二者之差却不增反降,直至在天顶距75°处出现负值,但也就是在天顶距75°处,二者之差的绝对值又开始增加;但总体上,在天顶距小于75°时二者之差的绝对值小于0″.11.可见,以映射函数形式的蒙气差公式取代复杂的普尔科沃大气折射表公式是可行的,也可以利用天文大气折射测定值来建立大气延迟模型.
[Abstract]:In this paper, the approximate generating function of neutral atmospheric refraction delay mapping function is restudied. On this basis, a new theoretical formula of astronomical atmospheric refraction, that is, the expression of mapping function, is obtained. There is a very small difference between the difference between the formula of the present paper and that of the formula of the Pulkovo atmospheric refraction meter. When the zenith distance is less than 30 掳, the difference between them is less than 0 ".05, and when the zenith distance is less than 65 掳, The difference between the two is less than 0 ".11; when the zenith distance is greater than 65 掳, the difference does not increase, but decreases, until a negative value occurs at 75 掳from the zenith, but at 75 掳from the zenith, the absolute value of the difference begins to increase; but on the whole, When the zenith distance is less than 75 掳, the absolute value of the difference between the two is less than 0 ". 11. It can be seen that it is feasible to replace the complex formula of Pulkovo atmospheric refractometer with the map-function formula. Atmospheric delay models can also be established by using astronomical atmospheric refraction measurements.
【作者单位】：河南理工大学测绘学院;
【基金】：河南省科技创新人才计划(094100510023) 地球空间环境与大地测量教育部重点实验室测绘基础研究基金(0702) 河南省基础与前沿研究项目(082300460140)联合资助
【分类号】：P128.1

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