PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/04/27-02:27:20
G02     33.1           55.6                8.0 +/-    0.96       9.5 +/-    0.96  0.160 / 0.320
G05     138.4          61.4               10.6 +/-    0.83      11.9 +/-    0.83  0.130 / 0.150
G06     53.0           16.9                6.1 +/-    2.90      14.5 +/-    2.90  0.040 / 0.010
G12     201.8          69.6               10.0 +/-    0.32      10.6 +/-    0.32  0.030 / 0.010
G19     98.5           11.6                9.3 +/-    2.75      25.1 +/-    2.75  0.040 / 0.020
G25     300.0          51.7               10.4 +/-    1.32      12.8 +/-    1.32  0.030 / 0.010
G29     306.0          26.3                8.9 +/-    0.59      16.8 +/-    0.59  0.040 / 0.020