PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/28-23:42:40
G02     251.0          78.3                8.8 +/-    0.83       9.0 +/-    0.83  0.120 / 0.130
G05     170.0          18.6               13.9 +/-    2.07      31.7 +/-    2.07  0.110 / 0.120
G06     39.4           59.0                8.7 +/-    0.32      10.0 +/-    0.32  0.050 / 0.070
G12     320.8          51.2                8.4 +/-    0.96      10.4 +/-    0.96  0.040 / 0.060
G17     72.5           20.5                9.5 +/-    1.01      20.6 +/-    1.01  0.110 / 0.320
G19     59.1           36.9                8.8 +/-    0.38      13.5 +/-    0.38  0.120 / 0.380
G24     241.8          33.3               12.6 +/-    1.22      20.6 +/-    1.22  0.030 / 0.050
G25     316.7          14.5                7.8 +/-    2.20      19.5 +/-    2.20  0.040 / 0.030