PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/04/30-21:58:10
G01     40.9           16.0                9.0 +/-    0.80      21.8 +/-    0.80  0.120 / 0.360
G06     174.4          40.3               17.5 +/-    0.94      25.4 +/-    0.94  0.160 / 0.340
G13     237.4          21.6               18.6 +/-    2.32      39.4 +/-    2.32  0.120 / 0.190
G15     270.5          12.1               16.3 +/-    2.65      43.5 +/-    2.65  0.120 / 0.250
G17     351.0          72.1               12.3 +/-    0.59      12.9 +/-    0.59  0.170 / 0.270
G19     277.1          68.5               12.2 +/-    0.50      13.0 +/-    0.50  0.130 / 0.300
G24     316.3          19.8               12.2 +/-    1.97      27.0 +/-    1.97  0.050 / 0.080
G28     72.8           46.3               11.5 +/-    1.28      15.2 +/-    1.28  0.050 / 0.080
G30     154.4          25.7               16.3 +/-    0.74      31.3 +/-    0.74  0.070 / 0.090