PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/02/12-04:12:20
G02     201.9          34.7                7.2 +/-    1.19      11.4 +/-    1.19  0.060 / 0.090
G06     167.5          65.4                4.5 +/-    0.62       4.9 +/-    0.62  0.060 / 0.090
G12     306.3          12.6                3.7 +/-    1.75       9.7 +/-    1.75  0.020 / 0.030
G17     33.0           51.7                3.2 +/-    1.19       4.0 +/-    1.19  0.030 / 0.030
G19     358.5          66.1                2.5 +/-    0.51       2.7 +/-    0.51  0.040 / 0.040
G24     300.7          36.5                3.8 +/-    1.74       5.8 +/-    1.74  0.040 / 0.040
G28     101.2          31.8                4.0 +/-    0.98       6.8 +/-    0.98  0.280 / 0.270