PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/03/12-05:12:20
G02     45.9           43.8                3.7 +/-    1.78       5.1 +/-    1.78  0.050 / 0.060
G05     100.0          69.1                3.1 +/-    0.79       3.2 +/-    0.79  0.050 / 0.050
G06     60.1           10.2               -0.2 +/-    6.18      -0.5 +/-    6.18  0.040 / 0.060
G12     191.8          54.4                5.8 +/-    1.71       7.0 +/-    1.71  0.040 / 0.050
G25     266.5          59.5                3.9 +/-    1.32       4.4 +/-    1.32  0.030 / 0.040
G29     320.3          43.8                3.5 +/-    2.41       4.8 +/-    2.41  0.040 / 0.040