PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/11/23-11:57:30
G02     27.5           59.6                4.6 +/-    0.40       5.2 +/-    0.40  0.040 / 0.050
G05     150.5          57.0                7.7 +/-    0.82       9.0 +/-    0.82  0.040 / 0.050
G06     51.1           19.8                0.4 +/-    1.91       1.0 +/-    1.91  0.030 / 0.030
G12     205.7          72.6                5.3 +/-    0.94       5.5 +/-    0.94  0.030 / 0.030
G19     95.4           14.6                4.0 +/-    0.94      10.1 +/-    0.94  0.060 / 0.150
G25     298.0          55.2                5.4 +/-    0.93       6.5 +/-    0.93  0.090 / 0.130
G29     304.5          25.5                5.3 +/-    1.61      10.3 +/-    1.61  0.050 / 0.040