PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/09/15-14:28:10
G02     217.5          56.3                6.9 +/-    0.74       8.1 +/-    0.74  0.090 / 0.340
G06     55.2           72.8                7.1 +/-    0.63       7.4 +/-    0.63  0.120 / 0.360
G12     319.7          39.9                5.6 +/-    0.71       8.1 +/-    0.71  0.060 / 0.120
G17     58.7           30.7                6.5 +/-    1.10      11.2 +/-    1.10  0.080 / 0.120
G19     34.2           52.4                6.5 +/-    0.40       8.0 +/-    0.40  0.040 / 0.070
G24     261.2          41.9                6.8 +/-    1.16       9.6 +/-    1.16  0.050 / 0.070
G28     122.8          14.0                7.0 +/-    1.36      17.8 +/-    1.36  0.050 / 0.040