PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/12-04:27:50
G05     48.7           16.4                2.5 +/-    1.09       5.9 +/-    1.09  0.160 / 0.300
G10     235.5          11.4               -5.6 +/-   35.47     -15.0 +/-   35.47  0.170 / 0.380
G13     77.4           36.6                7.6 +/-    0.76      11.7 +/-    0.76  0.100 / 0.280
G15     125.5          51.6                9.2 +/-    0.41      11.3 +/-    0.41  0.140 / 0.210
G16     314.5          12.4                5.6 +/-    5.13      14.8 +/-    5.13  0.060 / 0.060
G20     258.0          59.0                8.7 +/-    1.58       9.9 +/-    1.58  0.040 / 0.070
G21     311.8          46.1                7.6 +/-    0.92      10.2 +/-    0.92  0.060 / 0.090
G25     200.5          12.0                8.1 +/-    2.05      21.5 +/-    2.05  0.070 / 0.080
G26     287.2          20.9                6.7 +/-    1.86      14.4 +/-    1.86  0.110 / 0.330
G29     155.2          74.2                9.7 +/-    0.76      10.1 +/-    0.76  0.130 / 0.420