PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/07/30-12:27:30
G01     128.8          10.2              -10.8 +/-   31.14     -30.1 +/-   31.14  0.040 / 0.040
G07     45.8           69.7                5.5 +/-    0.63       5.9 +/-    0.63  0.040 / 0.040
G08     51.6           40.3                4.2 +/-    1.23       6.1 +/-    1.23  0.030 / 0.020
G09     176.8          36.6                5.5 +/-    1.07       8.5 +/-    1.07  0.030 / 0.030
G11     119.7          34.1                5.7 +/-    1.11       9.2 +/-    1.11  0.230 / 0.290
G17     199.5          13.2                3.7 +/-    3.21       9.5 +/-    3.21  0.150 / 0.240
G18     105.4          15.5                4.9 +/-    1.57      12.0 +/-    1.57  0.130 / 0.260
G28     272.6          51.6                6.1 +/-    3.27       7.6 +/-    3.27  0.140 / 0.310
G30     329.0          57.7                4.3 +/-    0.42       5.0 +/-    0.42  0.060 / 0.070