PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/09/23-07:57:50
G07     354.7          64.5                4.2 +/-    0.85       4.6 +/-    0.85  0.080 / 0.080
G08     75.6           50.8                5.6 +/-    0.61       7.0 +/-    0.61  0.070 / 0.070
G09     175.3          55.7                7.5 +/-    1.02       8.9 +/-    1.02  0.030 / 0.050
G11     136.6          21.4                6.0 +/-    1.28      12.7 +/-    1.28  0.030 / 0.040
G23     159.2          30.6                6.2 +/-    0.81      10.7 +/-    0.81  0.050 / 0.110
G27     46.4           25.5                4.6 +/-    0.90       8.8 +/-    0.90  0.060 / 0.110
G28     247.2          37.6                7.4 +/-    1.12      11.2 +/-    1.12  0.060 / 0.120
G30     310.4          41.8                1.6 +/-    1.99       2.3 +/-    1.99  0.050 / 0.110