PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/09/08-16:57:40
G02     297.5          81.1                8.5 +/-    0.74       8.6 +/-    0.74  0.090 / 0.190
G05     171.1          24.1               15.1 +/-    1.26      30.2 +/-    1.26  0.110 / 0.190
G06     40.4           46.8                7.2 +/-    0.40       9.4 +/-    0.40  0.030 / 0.050
G12     318.0          64.9                7.2 +/-    0.96       7.8 +/-    0.96  0.030 / 0.050
G17     82.7           12.6                8.0 +/-    1.85      21.0 +/-    1.85  0.070 / 0.170
G19     70.9           29.3                7.7 +/-    0.66      13.7 +/-    0.66  0.070 / 0.170
G24     235.1          27.4                9.3 +/-    2.04      17.3 +/-    2.04  0.040 / 0.050
G25     317.7          26.7                7.3 +/-    0.75      13.8 +/-    0.75  0.030 / 0.060