【摘要】 利用BJFS和SHAO两个测站2016—2017年的观测数据,研究了高阶电离层延迟改正对静态精密单点定位PPP(Precise Point Positioning)的影响。实验结果表明:高阶电离层延迟改正对静态PPP的收敛时间没有影响;高阶电离层延迟改正对PPP定位在N-S方向影响最为显著,出现向南偏移的趋势,对BJFS测站的影响值为0.5～1.5 mm,对SHAO测站的影响值为0.5～3.0 mm;在U-D方向次之,出现垂直方向向上的偏移趋势,对BJFS测站的影响值为-0.5～0.0 mm,对SHAO测站的影响值为-0.5～1.0 mm;在东西(E-W)方向影响最小,对两个测站的影响值都在-0.2～0.2 mm,可以忽略不计;而且随着纬度的增加,对E、N、U这3个方向分量的影响越来越小。更多还原

【Abstract】 The influence of the higher-order ionospheric correction on static precise point positioning(PPP) is studied by using the observed data of BJFS and SHAO stations from 2016 to 2017. The experimental results show that the higher-order ionospheric delay correction has no effect on the convergence time of static PPP. And higher-order ionospheric delay has the greatest influences in the north-south direction, which reach about 0.5～1.5 mm and 0.5～3 mm to BJFS and SHAO respectively. For the vertical direction, they reach-0.5～0.0 mm and-0.5～1.0 mm to BJFS and SHAO respectively. The influences of higher-order ionospheric delay on both stations in the east-west direction are-0.2～0.2 mm, which can be neglected. Moreover, as the latitude increases, the influence of higher-order ionospheric delay in the three directions of E,N and U become smaller and smaller.更多还原