PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/02/19-14:27:40
G08     275.3          19.6                4.8 +/-    1.52      10.7 +/-    1.52  0.290 / 0.250
G10     50.1           60.6                5.9 +/-    1.14       6.6 +/-    1.14  0.090 / 0.380
G11     316.4          11.4               -0.0 +/-   19.54      -0.1 +/-   19.54  0.090 / 0.110
G14     254.6          61.2                7.7 +/-    1.10       8.6 +/-    1.10  0.080 / 0.130
G21     152.9          18.5                7.4 +/-    2.40      16.8 +/-    2.40  0.130 / 0.190
G24     42.4           14.4                4.0 +/-    3.35      10.1 +/-    3.35  0.110 / 0.170
G27     235.0          19.1                5.8 +/-    4.31      13.0 +/-    4.31  0.050 / 0.050
G31     178.9          25.5                7.6 +/-    2.94      14.6 +/-    2.94  0.050 / 0.040
G32     320.9          76.0                6.5 +/-    0.49       6.7 +/-    0.49  0.040 / 0.060