PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/09/22-13:42:50
G02     212.0          48.7                6.1 +/-    1.35       7.8 +/-    1.35  0.060 / 0.070
G06     83.4           78.4                5.0 +/-    0.57       5.1 +/-    0.57  0.100 / 0.080
G12     316.7          32.4                3.9 +/-    1.61       6.4 +/-    1.61  0.050 / 0.080
G17     52.3           35.6                3.5 +/-    0.96       5.6 +/-    0.96  0.070 / 0.100
G19     23.4           57.1                5.0 +/-    0.60       5.9 +/-    0.60  0.030 / 0.020
G24     272.0          43.4                3.5 +/-    0.82       4.9 +/-    0.82  0.040 / 0.030
G28     117.1          19.9                6.7 +/-    1.78      14.7 +/-    1.78  0.040 / 0.040