PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/25-22:42:40
G02     206.9          46.2               15.6 +/-    0.73      20.7 +/-    0.73  0.130 / 0.260
G06     143.1          77.5               13.7 +/-    0.94      14.0 +/-    0.94  0.090 / 0.220
G12     311.7          21.1               10.3 +/-    1.32      22.0 +/-    1.32  0.060 / 0.070
G17     45.5           41.1               11.5 +/-    0.97      16.4 +/-    0.97  0.070 / 0.060
G19     20.5           58.4               12.8 +/-    0.85      14.7 +/-    0.85  0.050 / 0.050
G24     283.6          42.2               22.7 +/-    1.15      31.9 +/-    1.15  0.040 / 0.050
G28     110.0          28.0               13.8 +/-    0.73      25.2 +/-    0.73  0.100 / 0.110