PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/12/17-09:42:40
G02     245.9          78.3                5.9 +/-    0.46       6.1 +/-    0.46  0.140 / 0.260
G05     171.8          16.6                4.2 +/-    1.59      10.1 +/-    1.59  0.140 / 0.250
G06     39.4           63.7                5.5 +/-    0.60       6.1 +/-    0.60  0.040 / 0.030
G12     321.2          51.1                6.3 +/-    0.42       7.9 +/-    0.42  0.030 / 0.040
G17     72.4           21.1                5.7 +/-    1.97      12.3 +/-    1.97  0.090 / 0.110
G19     59.1           37.1                4.1 +/-    1.20       6.3 +/-    1.20  0.070 / 0.140
G24     246.0          34.6                8.4 +/-    1.85      13.5 +/-    1.85  0.030 / 0.020
G25     316.9          13.2                4.2 +/-    3.33      11.0 +/-    3.33  0.030 / 0.030