PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/09/16-09:28:00
G07     2.2            65.5                3.5 +/-    0.51       3.8 +/-    0.51  0.050 / 0.080
G08     72.8           50.2                6.0 +/-    0.84       7.6 +/-    0.84  0.050 / 0.090
G09     178.7          56.7                6.8 +/-    0.39       7.9 +/-    0.39  0.040 / 0.030
G11     134.5          21.6                3.5 +/-    1.47       7.5 +/-    1.47  0.030 / 0.030
G23     159.5          29.3                7.0 +/-    1.52      12.4 +/-    1.52  0.040 / 0.050
G27     44.0           22.2                3.5 +/-    1.87       7.3 +/-    1.87  0.050 / 0.050
G28     250.2          40.3                5.5 +/-    1.39       8.0 +/-    1.39  0.190 / 0.110
G30     312.2          43.3                3.9 +/-    0.93       5.5 +/-    0.93  0.110 / 0.110