PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/12-02:57:50
G02     42.8           46.4                6.6 +/-    1.00       8.7 +/-    1.00  0.040 / 0.050
G05     110.5          68.4                8.3 +/-    0.66       8.8 +/-    0.66  0.040 / 0.040
G06     58.4           11.2                4.9 +/-    2.43      13.4 +/-    2.43  0.030 / 0.040
G12     193.9          58.6                8.5 +/-    0.51       9.8 +/-    0.51  0.030 / 0.040
G25     276.3          58.7                3.6 +/-    0.91       4.1 +/-    0.91  0.030 / 0.020
G29     317.3          40.2                7.1 +/-    0.96      10.2 +/-    0.96  0.030 / 0.040