PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/09/06-12:27:40
G02     200.6          12.7                0.5 +/-    3.14       1.3 +/-    3.14  0.150 / 0.350
G06     171.1          48.2                5.8 +/-    0.93       7.5 +/-    0.93  0.150 / 0.240
G13     230.0          17.2                2.6 +/-    2.55       6.2 +/-    2.55  0.040 / 0.030
G17     9.7            66.3                3.5 +/-    1.01       3.8 +/-    1.01  0.030 / 0.030
G19     308.2          72.3                3.5 +/-    0.62       3.7 +/-    0.62  0.120 / 0.120
G24     313.6          24.3                2.9 +/-    1.24       5.7 +/-    1.24  0.110 / 0.090
G28     75.1           48.3                4.1 +/-    1.70       5.3 +/-    1.70  0.050 / 0.070
G30     156.7          20.9                4.2 +/-    0.98       9.1 +/-    0.98  0.040 / 0.080