PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/09/19-10:42:50
G01     50.4           25.4                5.0 +/-    1.77       9.6 +/-    1.77  0.040 / 0.060
G06     176.8          23.6                6.2 +/-    1.31      12.6 +/-    1.31  0.050 / 0.050
G07     145.1          12.7                3.6 +/-    3.08       9.6 +/-    3.08  0.110 / 0.270
G11     45.3           18.4                2.6 +/-    1.15       5.9 +/-    1.15  0.060 / 0.290
G13     251.0          32.2                8.2 +/-    1.41      13.7 +/-    1.41  0.040 / 0.030
G15     285.8          15.7                5.5 +/-    2.28      13.6 +/-    2.28  0.040 / 0.030
G17     291.9          78.5                7.3 +/-    0.94       7.4 +/-    0.94  0.070 / 0.150
G19     243.6          60.5                8.6 +/-    0.76       9.8 +/-    0.76  0.060 / 0.190
G28     38.5           57.8                4.3 +/-    0.39       5.0 +/-    0.39  0.040 / 0.050
G30     149.4          45.1                7.0 +/-    1.40       9.4 +/-    1.40  0.040 / 0.060