PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/18-22:57:50
G02     204.3          39.8               13.0 +/-    1.62      18.9 +/-    1.62  0.170 / 0.370
G06     160.5          71.5               12.8 +/-    0.98      13.4 +/-    0.98  0.160 / 0.260
G12     308.6          16.2                7.6 +/-    2.42      18.4 +/-    2.42  0.060 / 0.090
G17     40.4           45.3                9.5 +/-    0.60      12.7 +/-    0.60  0.060 / 0.080
G19     10.0           62.6                8.8 +/-    1.05       9.7 +/-    1.05  0.070 / 0.130
G24     291.5          40.6               10.7 +/-    0.72      15.4 +/-    0.72  0.050 / 0.120
G28     104.4          32.1               11.9 +/-    0.94      20.0 +/-    0.94  0.040 / 0.030