PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/10/26-14:57:20
G02     32.9           56.0                9.3 +/-    0.49      11.0 +/-    0.49  0.020 / 0.030
G05     146.1          60.2               12.7 +/-    0.60      14.4 +/-    0.60  0.030 / 0.040
G06     52.6           19.1                7.0 +/-    1.31      15.8 +/-    1.31  0.100 / 0.290
G12     204.1          69.6                8.9 +/-    2.11       9.4 +/-    2.11  0.140 / 0.230
G20     198.6          24.6               11.3 +/-    1.51      22.3 +/-    1.51  0.020 / 0.040
G25     296.9          54.2                9.5 +/-    0.77      11.5 +/-    0.77  0.030 / 0.030
G29     309.5          32.3                6.7 +/-    1.31      11.1 +/-    1.31  0.040 / 0.050