PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/06/21-14:43:10
G01     114.8          20.0               10.5 +/-    1.18      23.2 +/-    1.18  0.030 / 0.040
G07     95.4           60.1                9.7 +/-    0.32      11.0 +/-    0.32  0.030 / 0.040
G08     44.0           29.6                6.8 +/-    0.86      12.0 +/-    0.86  0.040 / 0.070
G09     177.0          23.5                9.9 +/-    2.31      20.1 +/-    2.31  0.040 / 0.070
G11     100.9          42.1               11.1 +/-    1.20      15.7 +/-    1.20  0.060 / 0.080
G13     315.2          23.4                7.0 +/-    1.83      14.1 +/-    1.83  0.060 / 0.090
G17     202.5          26.7               11.3 +/-    0.57      21.3 +/-    0.57  0.090 / 0.190
G18     88.8           22.1                8.5 +/-    1.74      17.9 +/-    1.74  0.080 / 0.180
G28     291.0          55.4                9.5 +/-    0.93      11.3 +/-    0.93  0.050 / 0.160
G30     2.1            73.6                9.3 +/-    1.43       9.6 +/-    1.43  0.050 / 0.130