PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/18-00:28:00
G02     251.1          78.4                8.1 +/-    0.71       8.2 +/-    0.71  0.100 / 0.100
G05     170.1          18.6               12.3 +/-    2.56      28.0 +/-    2.56  0.080 / 0.110
G06     39.3           59.6                8.9 +/-    1.05      10.1 +/-    1.05  0.080 / 0.070
G12     320.8          51.2                8.2 +/-    2.01      10.2 +/-    2.01  0.070 / 0.070
G17     72.7           20.3                8.1 +/-    1.46      17.7 +/-    1.46  0.130 / 0.320
G19     59.0           37.0               10.1 +/-    1.62      15.5 +/-    1.62  0.120 / 0.400
G24     241.5          33.3               10.2 +/-    1.84      16.6 +/-    1.84  0.050 / 0.040
G25     316.7          14.8                5.6 +/-    2.84      14.0 +/-    2.84  0.050 / 0.050