PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/09/15-16:27:50
G02     15.7           66.6                6.8 +/-    0.43       7.3 +/-    0.43  0.030 / 0.020
G05     156.2          51.3                9.6 +/-    0.83      12.0 +/-    0.83  0.030 / 0.020
G06     49.0           22.5                5.6 +/-    1.51      11.6 +/-    1.51  0.040 / 0.040
G12     208.3          76.3                8.0 +/-    0.62       8.2 +/-    0.62  0.030 / 0.050
G19     89.9           19.7                8.2 +/-    1.42      18.2 +/-    1.42  0.060 / 0.070
G25     307.1          48.1                7.4 +/-    1.88       9.6 +/-    1.88  0.080 / 0.060
G29     299.8          20.2                6.5 +/-    1.57      14.2 +/-    1.57  0.110 / 0.140