PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/05/12-21:27:20
G02     205.9          43.3               14.5 +/-    1.79      20.0 +/-    1.79  0.060 / 0.140
G06     148.0          75.7               15.1 +/-    1.23      15.5 +/-    1.23  0.070 / 0.190
G12     310.5          19.2               10.9 +/-    1.13      24.4 +/-    1.13  0.030 / 0.040
G17     43.0           43.3               11.3 +/-    0.73      15.6 +/-    0.73  0.040 / 0.040
G19     17.1           59.9               12.3 +/-    0.80      14.0 +/-    0.80  0.040 / 0.050
G24     287.3          41.4               10.0 +/-    1.83      14.2 +/-    1.83  0.040 / 0.040
G28     107.7          29.9               14.2 +/-    1.05      24.9 +/-    1.05  0.140 / 0.170