PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/02/19-14:27:30
G08     275.3          19.6                5.3 +/-    2.47      11.7 +/-    2.47  0.090 / 0.180
G10     50.1           60.6                4.9 +/-    0.72       5.5 +/-    0.72  0.200 / 0.230
G11     316.4          11.4                0.0 +/-   14.69       0.1 +/-   14.69  0.070 / 0.150
G14     254.6          61.2                7.2 +/-    0.61       8.0 +/-    0.61  0.110 / 0.150
G21     152.9          18.5                8.0 +/-    2.63      18.2 +/-    2.63  0.100 / 0.290
G24     42.4           14.4                4.3 +/-    2.22      10.8 +/-    2.22  0.100 / 0.310
G27     235.0          19.1                5.9 +/-    1.05      13.3 +/-    1.05  0.050 / 0.050
G31     178.9          25.5                7.5 +/-    1.18      14.4 +/-    1.18  0.050 / 0.050
G32     320.9          76.0                6.0 +/-    0.98       6.2 +/-    0.98  0.030 / 0.040