PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/09/22-14:57:40
G02     216.2          59.6               10.2 +/-    0.99      11.7 +/-    0.99  0.060 / 0.080
G06     58.5           75.3                8.4 +/-    1.20       8.6 +/-    1.20  0.060 / 0.070
G12     318.8          36.2                7.9 +/-    1.66      12.2 +/-    1.66  0.070 / 0.080
G17     59.7           29.8                7.2 +/-    1.05      12.7 +/-    1.05  0.030 / 0.090
G19     42.5           47.3                7.2 +/-    0.49       9.4 +/-    0.49  0.030 / 0.030
G24     267.1          41.3                8.7 +/-    2.32      12.4 +/-    2.32  0.030 / 0.030
G28     123.5          12.6                8.6 +/-    1.85      22.8 +/-    1.85  0.070 / 0.110