PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/11/19-16:12:40
G05     47.4           21.6                8.4 +/-    2.51      17.8 +/-    2.51  0.260 / 0.370
G13     83.0           37.2               12.5 +/-    1.45      19.1 +/-    1.45  0.180 / 0.260
G15     128.5          49.4               12.8 +/-    0.44      16.3 +/-    0.44  0.070 / 0.060
G18     242.0          40.2               12.2 +/-    1.46      17.6 +/-    1.46  0.040 / 0.050
G20     19.7           72.3                9.8 +/-    0.44      10.3 +/-    0.44  0.040 / 0.040
G21     312.2          47.6               10.3 +/-    1.02      13.4 +/-    1.02  0.040 / 0.040
G25     201.0          13.6               14.5 +/-    5.44      37.2 +/-    5.44  0.070 / 0.150
G26     295.4          19.2                7.7 +/-    1.16      17.2 +/-    1.16  0.080 / 0.170
G29     148.0          71.1               12.8 +/-    0.30      13.4 +/-    0.30  0.280 / 0.390