PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/09/12-08:42:30
G07     354.2          64.4                4.2 +/-    0.75       4.6 +/-    0.75  0.050 / 0.130
G08     75.9           50.9                5.5 +/-    0.92       6.9 +/-    0.92  0.050 / 0.140
G09     176.1          56.3                7.7 +/-    0.96       9.1 +/-    0.96  0.080 / 0.080
G11     136.8          21.3                6.3 +/-    1.28      13.4 +/-    1.28  0.060 / 0.090
G23     159.0          30.3                6.0 +/-    1.55      10.4 +/-    1.55  0.030 / 0.050
G27     46.3           25.4                4.4 +/-    0.61       8.5 +/-    0.61  0.030 / 0.050
G28     247.3          37.7                7.3 +/-    1.14      11.1 +/-    1.14  0.030 / 0.050
G30     310.4          41.8                3.9 +/-    2.03       5.5 +/-    2.03  0.030 / 0.040