PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/09/09-07:43:10
G07     346.4          62.5                3.5 +/-    0.68       3.9 +/-    0.68  0.030 / 0.040
G08     93.8           53.5                5.1 +/-    0.42       6.1 +/-    0.42  0.040 / 0.040
G09     183.5          67.0                3.8 +/-    1.71       4.1 +/-    1.71  0.080 / 0.180
G11     143.0          17.6                4.0 +/-    1.58       9.4 +/-    1.58  0.070 / 0.180
G23     156.6          33.9                4.8 +/-    1.09       7.7 +/-    1.09  0.060 / 0.090
G27     50.4           28.6                1.8 +/-    1.12       3.3 +/-    1.12  0.050 / 0.110
G28     239.6          27.4                5.2 +/-    0.82       9.7 +/-    0.82  0.030 / 0.030
G30     305.8          38.2                3.2 +/-    1.80       4.8 +/-    1.80  0.030 / 0.040