PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/09/17-04:28:10
G01     240.4          29.2                5.8 +/-    1.33      10.4 +/-    1.33  0.040 / 0.030
G03     312.5          51.1                3.3 +/-    1.24       4.1 +/-    1.24  0.040 / 0.030
G14     71.5           33.4                2.8 +/-    0.97       4.6 +/-    0.97  0.100 / 0.130
G16     160.8          26.2                6.3 +/-    1.38      11.9 +/-    1.38  0.100 / 0.150
G22     284.4          73.4                5.3 +/-    0.61       5.5 +/-    0.61  0.090 / 0.130
G23     293.4          24.1                4.3 +/-    1.20       8.6 +/-    1.20  0.100 / 0.140
G26     130.3          45.0                6.5 +/-    0.57       8.8 +/-    0.57  0.030 / 0.050
G31     39.7           50.8                2.5 +/-    0.42       3.1 +/-    0.42  0.030 / 0.040
G32     84.6           19.0                3.5 +/-    0.86       7.8 +/-    0.86  0.080 / 0.210