PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/09/26-17:58:00
G02     53.6           38.0               12.3 +/-    0.74      18.5 +/-    0.74  0.040 / 0.030
G05     80.0           69.9               13.2 +/-    0.41      14.0 +/-    0.41  0.040 / 0.050
G12     187.2          40.8               14.0 +/-    0.56      20.1 +/-    0.56  0.150 / 0.490
G13     135.4          10.1               -0.6 +/-   25.46      -1.7 +/-   25.46  0.100 / 0.490
G20     204.2          52.1               15.9 +/-    0.44      19.6 +/-    0.44  0.060 / 0.060
G21     265.8          14.2               13.4 +/-    2.26      34.0 +/-    2.26  0.070 / 0.060
G25     244.0          56.1               15.6 +/-    1.64      18.4 +/-    1.64  0.030 / 0.020
G29     326.7          51.8               11.7 +/-    1.33      14.4 +/-    1.33  0.020 / 0.020