PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/09/14-14:12:40
G02     211.4          47.0                8.6 +/-    2.12      11.2 +/-    2.12  0.060 / 0.050
G06     89.6           78.7                8.5 +/-    0.49       8.6 +/-    0.49  0.050 / 0.040
G12     316.4          31.7                5.6 +/-    1.93       9.5 +/-    1.93  0.050 / 0.070
G17     51.2           36.6                5.7 +/-    0.60       8.8 +/-    0.60  0.050 / 0.070
G19     21.1           58.1               -0.1 +/-    7.80      -0.1 +/-    7.80  0.080 / 0.130
G24     274.0          43.4                5.8 +/-    1.23       8.1 +/-    1.23  0.090 / 0.110
G28     116.2          20.7                9.0 +/-    1.31      19.5 +/-    1.31  0.040 / 0.030