PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/09/16-21:27:40
G10     277.3          43.9                8.4 +/-    1.58      11.4 +/-    1.58  0.040 / 0.050
G13     38.5           11.0                8.6 +/-    2.54      23.5 +/-    2.54  0.030 / 0.040
G15     54.2           46.7                8.8 +/-    0.77      11.6 +/-    0.77  0.110 / 0.140
G20     316.2          63.6                8.0 +/-    0.67       8.8 +/-    0.67  0.090 / 0.130
G21     31.6           76.3                9.3 +/-    0.58       9.5 +/-    0.58  0.130 / 0.230
G24     110.1          19.5               10.4 +/-    0.97      23.2 +/-    0.97  0.130 / 0.260
G27     314.3          24.7                7.6 +/-    1.45      15.0 +/-    1.45  0.100 / 0.350
G29     168.7          22.5               10.1 +/-    1.62      20.9 +/-    1.62  0.110 / 0.480
G32     205.5          18.4               10.0 +/-    2.54      23.0 +/-    2.54  0.040 / 0.040