PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/09/20-07:43:00
G07     33.3           69.1                5.9 +/-    0.55       6.3 +/-    0.55  0.050 / 0.050
G08     60.2           47.5                4.2 +/-    0.79       5.5 +/-    0.79  0.040 / 0.050
G09     177.9          44.4                6.7 +/-    1.75       9.1 +/-    1.75  0.030 / 0.030
G11     128.1          31.1                5.3 +/-    1.19       9.0 +/-    1.19  0.030 / 0.040
G18     110.3          12.5                2.5 +/-    2.96       6.5 +/-    2.96  0.130 / 0.210
G23     159.9          14.3                4.7 +/-    2.82      11.9 +/-    2.82  0.070 / 0.140
G27     39.0           14.1                1.6 +/-    1.65       4.2 +/-    1.65  0.110 / 0.330
G28     258.7          41.8                5.6 +/-    1.27       7.9 +/-    1.27  0.150 / 0.300
G30     322.3          52.7                6.1 +/-    0.94       7.5 +/-    0.94  0.040 / 0.060