PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/09/15-19:12:40
G02     64.0           29.5               15.1 +/-    1.12      26.7 +/-    1.12  0.080 / 0.120
G05     54.1           60.7               16.2 +/-    0.74      18.2 +/-    0.74  0.120 / 0.150
G12     184.2          26.5               21.4 +/-    1.35      40.3 +/-    1.35  0.050 / 0.090
G13     125.3          19.1               19.9 +/-    2.44      44.7 +/-    2.44  0.060 / 0.080
G15     160.9          16.4               25.7 +/-    3.54      61.7 +/-    3.54  0.080 / 0.250
G20     211.3          67.2               18.7 +/-    1.03      20.1 +/-    1.03  0.110 / 0.310
G21     276.2          21.9               16.3 +/-    1.80      34.3 +/-    1.80  0.030 / 0.040
G25     224.3          46.3               19.0 +/-    0.80      25.1 +/-    0.80  0.030 / 0.040
G29     336.3          64.0               16.4 +/-    0.76      18.0 +/-    0.76  0.030 / 0.050