PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/08/18-19:42:30
G02     53.2           38.9                9.6 +/-    0.43      14.2 +/-    0.43  0.040 / 0.040
G05     69.7           66.2                9.4 +/-    0.80      10.2 +/-    0.80  0.030 / 0.040
G12     182.3          35.5               13.7 +/-    1.06      21.5 +/-    1.06  0.160 / 0.350
G13     132.4          11.2               -0.6 +/-   33.32      -1.7 +/-   33.32  0.130 / 0.330
G21     266.2          12.6               12.8 +/-   14.46      33.8 +/-   14.46  0.080 / 0.090
G25     245.0          55.6               12.2 +/-    0.77      14.5 +/-    0.77  0.110 / 0.090
G29     323.5          47.6                9.4 +/-    1.20      12.3 +/-    1.20  0.180 / 0.530