PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/09/19-10:27:50
G01     56.7           28.7                3.9 +/-    1.43       7.1 +/-    1.43  0.100 / 0.250
G07     142.5          19.0                3.8 +/-    2.05       8.5 +/-    2.05  0.100 / 0.210
G11     47.7           24.0                4.7 +/-    1.79       9.4 +/-    1.79  0.020 / 0.030
G13     258.8          35.5                9.5 +/-    1.92      15.0 +/-    1.92  0.030 / 0.030
G15     292.4          16.1                5.9 +/-    1.18      14.4 +/-    1.18  0.110 / 0.070
G17     259.4          75.9                8.6 +/-    0.46       8.9 +/-    0.46  0.080 / 0.080
G18     40.5           11.3                3.4 +/-    3.01       9.1 +/-    3.01  0.140 / 0.400
G19     234.1          54.5                8.5 +/-    2.17      10.1 +/-    2.17  0.180 / 0.330
G28     26.2           59.5                6.0 +/-    0.80       6.8 +/-    0.80  0.040 / 0.040
G30     145.5          52.2                7.9 +/-    0.92       9.7 +/-    0.92  0.040 / 0.040