PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/09/12-04:57:40
G03     253.1          69.3                5.0 +/-    1.32       5.3 +/-    1.32  0.030 / 0.040
G09     303.0          20.1                1.7 +/-    2.93       3.7 +/-    2.93  0.040 / 0.040
G14     96.6           17.4                3.5 +/-    2.70       8.3 +/-    2.70  0.160 / 0.270
G16     129.2          56.6                5.3 +/-    0.90       6.2 +/-    0.90  0.120 / 0.250
G22     199.5          59.5                6.1 +/-    0.75       6.9 +/-    0.75  0.040 / 0.060
G23     316.0          45.7                4.6 +/-    0.91       6.1 +/-    0.91  0.040 / 0.060
G26     73.5           52.4                3.6 +/-    0.87       4.4 +/-    0.87  0.040 / 0.040
G31     50.8           21.6                2.1 +/-    2.61       4.5 +/-    2.61  0.050 / 0.040