PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/07/18-17:57:40
G02     232.3          71.0                8.6 +/-    0.46       9.1 +/-    0.46  0.070 / 0.120
G05     173.2          12.7                9.5 +/-    5.73      24.9 +/-    5.73  0.070 / 0.130
G06     41.9           62.2                7.2 +/-    0.62       8.0 +/-    0.62  0.030 / 0.030
G12     320.7          46.4                8.5 +/-    0.46      11.2 +/-    0.46  0.040 / 0.030
G17     65.7           27.0                4.5 +/-    0.96       8.5 +/-    0.96  0.050 / 0.120
G19     53.7           39.8                7.1 +/-    1.48      10.4 +/-    1.48  0.060 / 0.110
G24     250.1          36.7               10.1 +/-    2.43      15.5 +/-    2.43  0.050 / 0.080