PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/08/09-11:27:50
G01     112.5          21.2                2.8 +/-    1.50       5.9 +/-    1.50  0.060 / 0.070
G07     97.4           60.3                5.6 +/-    0.93       6.3 +/-    0.93  0.050 / 0.070
G08     43.9           30.2                3.2 +/-    1.28       5.5 +/-    1.28  0.020 / 0.040
G09     176.1          20.8                4.6 +/-    0.88       9.9 +/-    0.88  0.030 / 0.040
G11     99.3           42.9                4.4 +/-    0.47       6.1 +/-    0.47  0.120 / 0.120
G13     314.0          25.1                1.5 +/-    0.96       2.9 +/-    0.96  0.110 / 0.160
G17     203.7          26.4                3.7 +/-    1.72       6.9 +/-    1.72  0.110 / 0.180
G18     87.0           22.8                2.4 +/-    1.27       4.9 +/-    1.27  0.120 / 0.160
G28     293.2          55.6                2.6 +/-    1.32       3.0 +/-    1.32  0.050 / 0.070
G30     359.0          73.7                4.2 +/-    0.85       4.4 +/-    0.85  0.060 / 0.070