PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/20-09:43:00
G08     264.0          17.0                7.0 +/-    1.87      16.5 +/-    1.87  0.030 / 0.040
G10     68.2           56.0                3.3 +/-    0.85       3.9 +/-    0.85  0.040 / 0.040
G11     308.7          19.7                4.5 +/-    2.15      10.0 +/-    2.15  0.210 / 0.400
G14     275.6          68.8                4.7 +/-    0.54       5.0 +/-    0.54  0.260 / 0.390
G18     309.8          36.5                5.6 +/-    1.92       8.6 +/-    1.92  0.150 / 0.230
G20     98.8           34.2                4.0 +/-    1.04       6.5 +/-    1.04  0.170 / 0.270
G21     155.0          10.8                4.1 +/-    0.99      11.2 +/-    0.99  0.040 / 0.050
G27     230.8          14.3                4.8 +/-    1.77      12.0 +/-    1.77  0.040 / 0.050
G31     178.1          33.1                4.4 +/-    2.05       7.2 +/-    2.05  0.120 / 0.290
G32     330.9          73.6                4.7 +/-    0.61       4.9 +/-    0.61  0.110 / 0.270