PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/02/12-04:27:50
G02     204.0          41.7                8.2 +/-    1.82      11.6 +/-    1.82  0.030 / 0.050
G06     158.7          72.6                6.5 +/-    0.59       6.8 +/-    0.59  0.020 / 0.050
G12     309.9          17.8                4.2 +/-    1.43       9.7 +/-    1.43  0.090 / 0.170
G17     39.5           46.7                2.4 +/-    0.47       3.2 +/-    0.47  0.110 / 0.190
G19     12.1           62.0                3.5 +/-    0.81       4.0 +/-    0.81  0.040 / 0.020
G24     293.3          39.6                4.4 +/-    1.72       6.4 +/-    1.72  0.050 / 0.030
G28     107.5          27.3                5.8 +/-    1.40      10.8 +/-    1.40  0.070 / 0.080