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                2.5 +/-    1.28       4.5 +/-    1.28  0.050 / 0.050
G07     142.5          19.0                6.2 +/-    1.93      14.1 +/-    1.93  0.040 / 0.040
G11     47.7           24.0                2.8 +/-    0.99       5.5 +/-    0.99  0.090 / 0.260
G13     258.8          35.5                7.8 +/-    0.72      12.2 +/-    0.72  0.080 / 0.250
G15     292.4          16.1                3.7 +/-    2.67       9.0 +/-    2.67  0.020 / 0.030
G17     259.4          75.9                7.5 +/-    0.51       7.7 +/-    0.51  0.030 / 0.030
G18     40.5           11.3                3.1 +/-    2.96       8.5 +/-    2.96  0.070 / 0.130
G19     234.1          54.5                8.2 +/-    1.56       9.8 +/-    1.56  0.070 / 0.130
G28     26.2           59.5                4.2 +/-    0.75       4.8 +/-    0.75  0.050 / 0.070
G30     145.5          52.2                8.0 +/-    0.69       9.8 +/-    0.69  0.040 / 0.070