PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/09/12-21:57:30
G10     285.0          47.3               11.2 +/-    2.74      14.7 +/-    2.74  0.080 / 0.110
G15     50.3           41.8                7.9 +/-    0.69      11.2 +/-    0.69  0.080 / 0.100
G20     330.4          64.9               10.7 +/-    0.52      11.7 +/-    0.52  0.070 / 0.170
G21     58.7           77.2               11.3 +/-    0.40      11.6 +/-    0.40  0.070 / 0.150
G24     104.3          22.5               10.2 +/-    0.79      21.2 +/-    0.79  0.150 / 0.260
G27     309.8          28.8                9.7 +/-    0.82      17.5 +/-    0.82  0.140 / 0.380
G29     168.7          16.5               12.9 +/-    2.95      31.0 +/-    2.95  0.040 / 0.030
G32     207.1          24.3               15.4 +/-    2.31      30.5 +/-    2.31  0.030 / 0.030