PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/09/20-06:57:40
G07     345.0          62.1                4.6 +/-    0.88       5.2 +/-    0.88  0.030 / 0.040
G08     93.5           53.3                6.3 +/-    0.48       7.7 +/-    0.48  0.030 / 0.040
G09     183.0          67.2                5.4 +/-    0.35       5.8 +/-    0.35  0.070 / 0.110
G11     143.5          17.2                4.8 +/-    2.22      11.2 +/-    2.22  0.090 / 0.170
G23     156.6          34.8                5.3 +/-    1.24       8.4 +/-    1.24  0.020 / 0.030
G27     50.7           28.8                4.3 +/-    2.07       7.6 +/-    2.07  0.030 / 0.030
G28     239.2          26.9                5.4 +/-    2.22      10.1 +/-    2.22  0.040 / 0.050
G30     305.2          37.5                4.7 +/-    1.20       7.1 +/-    1.20  0.040 / 0.040