PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/11/18-11:28:10
G02     230.0          72.6                7.3 +/-    0.36       7.6 +/-    0.36  0.190 / 0.290
G05     174.8          11.1               -5.2 +/-   14.28     -14.1 +/-   14.28  0.180 / 0.310
G06     42.7           67.7                4.5 +/-    0.66       4.8 +/-    0.66  0.070 / 0.070
G12     321.0          45.6                5.0 +/-    0.80       6.7 +/-    0.80  0.070 / 0.070
G17     68.1           23.9                5.1 +/-    0.85      10.3 +/-    0.85  0.040 / 0.050
G19     53.6           40.5                4.2 +/-    1.30       6.1 +/-    1.30  0.040 / 0.040
G24     252.7          37.5                5.6 +/-    1.99       8.5 +/-    1.99  0.080 / 0.080