PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/09/17-13:27:20
G02     205.1          32.0                5.6 +/-    1.76       9.4 +/-    1.76  0.060 / 0.070
G06     153.9          71.2                7.3 +/-    1.03       7.7 +/-    1.03  0.070 / 0.090
G12     309.2          19.3                4.1 +/-    1.28       9.2 +/-    1.28  0.110 / 0.160
G17     38.6           46.9                5.7 +/-    0.21       7.5 +/-    0.21  0.100 / 0.190
G19     352.4          66.3                4.0 +/-    0.56       4.4 +/-    0.56  0.030 / 0.040
G24     293.9          40.5                4.4 +/-    0.81       6.4 +/-    0.81  0.030 / 0.040
G28     103.4          31.0                7.3 +/-    1.56      12.6 +/-    1.56  0.040 / 0.040