PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/09/28-08:27:50
G01     126.7          11.8                0.4 +/-   28.67       1.0 +/-   28.67  0.030 / 0.030
G07     56.3           69.1                5.7 +/-    0.28       6.1 +/-    0.28  0.030 / 0.020
G08     49.1           37.3                4.2 +/-    1.05       6.5 +/-    1.05  0.050 / 0.030
G09     174.1          30.6                7.1 +/-    1.81      12.4 +/-    1.81  0.040 / 0.030
G11     116.3          35.8                7.7 +/-    1.30      12.0 +/-    1.30  0.090 / 0.290
G13     320.9          12.3                0.7 +/-   11.53       1.8 +/-   11.53  0.120 / 0.380
G17     199.2          16.9                5.2 +/-    1.78      12.3 +/-    1.78  0.200 / 0.320
G18     101.8          16.8                5.0 +/-    1.98      12.0 +/-    1.98  0.240 / 0.290
G28     275.6          52.3                6.4 +/-    3.68       7.8 +/-    3.68  0.100 / 0.260
G30     331.1          59.6                4.3 +/-    0.46       4.9 +/-    0.46  0.130 / 0.230