PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/09/25-13:57:40
G02     221.6          61.4                6.0 +/-    1.62       6.7 +/-    1.62  0.050 / 0.080
G06     47.9           68.7                5.7 +/-    0.42       6.0 +/-    0.42  0.070 / 0.080
G12     320.8          43.6                4.9 +/-    0.67       6.8 +/-    0.67  0.040 / 0.050
G17     62.5           27.6                5.9 +/-    2.04      10.8 +/-    2.04  0.060 / 0.050
G19     40.4           49.3                6.9 +/-    0.63       8.8 +/-    0.63  0.030 / 0.030
G24     254.9          40.3                6.6 +/-    4.10       9.5 +/-    4.10  0.030 / 0.030
G28     125.7          10.6                7.1 +/-    1.98      19.7 +/-    1.98  0.040 / 0.040