PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/09/12-05:58:00
G03     253.0          68.6                5.4 +/-    0.40       5.8 +/-    0.40  0.060 / 0.050
G09     302.9          18.8                3.1 +/-    2.04       7.0 +/-    2.04  0.050 / 0.050
G14     98.5           14.5                4.5 +/-    1.98      11.2 +/-    1.98  0.040 / 0.030
G16     136.4          56.6                7.0 +/-    0.45       8.3 +/-    0.45  0.030 / 0.030
G22     197.4          58.7                6.6 +/-    0.42       7.6 +/-    0.42  0.130 / 0.140
G23     316.1          45.5                5.5 +/-    1.10       7.4 +/-    1.10  0.150 / 0.150
G26     77.4           54.9                4.8 +/-    0.75       5.8 +/-    0.75  0.050 / 0.040
G31     50.2           23.4                2.9 +/-    1.91       5.9 +/-    1.91  0.050 / 0.040