PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/11/11-11:57:40
G02     230.2          72.6                5.4 +/-    0.33       5.6 +/-    0.33  0.130 / 0.270
G05     174.9          11.0               -3.9 +/-   14.87     -10.7 +/-   14.87  0.130 / 0.310
G06     42.6           67.1                3.2 +/-    0.38       3.4 +/-    0.38  0.070 / 0.080
G12     321.0          45.8                4.3 +/-    1.08       5.7 +/-    1.08  0.070 / 0.080
G17     68.3           23.6                2.6 +/-    2.66       5.3 +/-    2.66  0.040 / 0.070
G19     53.9           40.3                2.9 +/-    1.68       4.2 +/-    1.68  0.050 / 0.090
G24     252.5          37.5                5.5 +/-    1.47       8.3 +/-    1.47  0.040 / 0.040