高阶电离层改正对PPP对流层估计的影响  

High-Order Ionospheric Effect on Troposphere Estimation in Precise Point Positioning

作　　者：徐韶光[1] 熊永良[1] 王德军[1] 陈伟伟[1] 

机构地区：[1]西南交通大学地球科学与环境工程学院,成都市高新区西部园区611756

出　　处：《大地测量与地球动力学》2015年第3期387-390,共4页Journal of Geodesy and Geodynamics

基　　金：国家自然科学基金(40874015;412740044)

摘　　要：对观测量进行高阶电离层改正,利用改正后的观测量求解卫星轨道和卫星钟差,根据所得的卫星轨道和卫星钟差来计算其余测站的对流层。结果显示,二阶电离层在低纬度地区很容易达到1cm,可使对流层引起2~3mm的误差。而三阶电离层在低纬度地区一般不超过5mm,对对流层的影响不会超过0.5mm。数据测试表明,要获取1mm精度的对流层,中低纬度地区的二阶电离层必须进行改正,而三阶电离层可以忽略不计。Corrected by high-order ionospheric delay, observations are used to estimate satellite orbits and clocks. And the other site＇s tropospheric delay is calculated by these orbits and cloc sults show that it is easy to reach lcm value in the second-order ionosphere at low latitude can cause 2-3 mm error to troposphere es cannot exceed 5 mm at low latitude areas. ks. The re areas timation. But the third-order ionosphere estimation A data test implies that if 1 mm precision of tropos ty ph This pically ere estimation is desirable, then the site＇s second-order ionosphere computation must be corrected in middle and low latitude areas. Since the third-order ionosphere computation effect on troposphere estimation is very small, it can be safely neglected.

关 键 词：高阶电离层 精密单点定位 对流层 

分 类 号：P228.41[天文地球—大地测量学与测量工程]