PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/11/17-13:27:20
G02     33.6           55.4                6.2 +/-    0.68       7.4 +/-    0.68  0.030 / 0.050
G05     144.1          60.6                9.0 +/-    1.12      10.2 +/-    1.12  0.030 / 0.040
G06     52.2           20.1                3.0 +/-    1.35       6.7 +/-    1.35  0.030 / 0.040
G12     204.8          69.8                7.6 +/-    0.72       8.1 +/-    0.72  0.030 / 0.040
G20     199.0          23.9                7.9 +/-    1.36      15.8 +/-    1.36  0.130 / 0.250
G25     297.6          53.6                7.5 +/-    0.76       9.1 +/-    0.76  0.120 / 0.220
G29     309.3          31.9                5.0 +/-    1.59       8.5 +/-    1.59  0.080 / 0.190