PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/11/19-11:13:10
G02     222.2          67.9                7.0 +/-    0.82       7.5 +/-    0.82  0.040 / 0.060
G06     48.1           72.8                4.4 +/-    0.41       4.6 +/-    0.41  0.040 / 0.070
G12     320.1          40.8                4.2 +/-    0.71       6.1 +/-    0.71  0.070 / 0.090
G17     64.0           26.9                3.0 +/-    0.51       5.6 +/-    0.51  0.060 / 0.100
G19     48.5           43.7                3.7 +/-    0.96       5.1 +/-    0.96  0.050 / 0.070
G24     258.8          39.6                5.4 +/-    1.24       7.8 +/-    1.24  0.050 / 0.070