PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/05/07-08:42:40
G01     320.0          16.0                3.3 +/-    5.98       8.0 +/-    5.98  0.120 / 0.300
G08     260.5          15.0                4.5 +/-    2.55      11.1 +/-    2.55  0.210 / 0.320
G10     75.5           53.8                3.7 +/-    0.46       4.4 +/-    0.46  0.210 / 0.260
G11     305.4          21.9                4.4 +/-    1.20       9.3 +/-    1.20  0.240 / 0.330
G14     287.7          70.4                3.3 +/-    0.80       3.5 +/-    0.80  0.040 / 0.030
G18     306.6          39.6                4.1 +/-    1.64       6.0 +/-    1.64  0.040 / 0.030
G20     102.7          31.2                5.0 +/-    1.51       8.6 +/-    1.51  0.040 / 0.050
G27     227.5          11.4                3.6 +/-    1.79       9.6 +/-    1.79  0.040 / 0.050
G31     176.8          38.2                5.1 +/-    0.91       7.7 +/-    0.91  0.110 / 0.270
G32     347.8          71.6                3.6 +/-    0.47       3.7 +/-    0.47  0.080 / 0.210