PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/08/12-19:27:20
G02     38.2           51.2                9.0 +/-    0.89      11.2 +/-    0.89  0.020 / 0.030
G05     122.1          67.7                8.8 +/-    0.33       9.5 +/-    0.33  0.020 / 0.030
G12     186.1          55.4                9.8 +/-    0.44      11.6 +/-    0.44  0.030 / 0.040
G25     281.8          57.9                2.6 +/-    1.91       3.0 +/-    1.91  0.030 / 0.040
G29     312.1          32.8                6.1 +/-    1.14      10.0 +/-    1.14  0.040 / 0.040