【摘要】 本文提出了一种新的对流层干延迟映射函数,此模型形式简洁,精度较高,是完全应用几何方法得出的,模型只与大气的有效高度有关,不包含任何气象因素,适用于动态定位及导航。文中通过实验在不同高度角、不同纬度与目前最常用的CFA2·2和Niell映射函数进行了比较,结果表明,在高度角大于6度时此函数与这两种模型精度相当,得到了非常理想的效果。更多还原

【Abstract】 In this paper, we have developed a new geometric mapping function for the hydrostatic delay of dry tropospheric. The only free parameter in the mapping function is the climatological pressure scale height. The new mapping function is suitable for dynamic positioning and navigation. We compare the new mapping function with others currently in use (we compare with the CFA2.2 and the Niell mapping function, most frequently encountered in literature) in different elevation angles and latitudes. From the result, we can see that the new geometric mapping function displays comparable performance with the other mapping functions at elevation bigger than 6°.更多还原