PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/08/18-06:57:50
G03     233.0          65.8                4.6 +/-    0.71       5.0 +/-    0.71  0.060 / 0.050
G09     306.8          24.0                2.8 +/-    2.40       5.7 +/-    2.40  0.050 / 0.040
G14     102.7          12.6                3.3 +/-    2.97       8.8 +/-    2.97  0.040 / 0.050
G16     111.4          61.6                5.9 +/-    0.34       6.6 +/-    0.34  0.040 / 0.060
G22     194.1          51.7                6.0 +/-    0.74       7.5 +/-    0.74  0.110 / 0.350
G23     322.1          52.0                4.1 +/-    0.47       5.0 +/-    0.47  0.130 / 0.370
G26     61.0           47.4                5.0 +/-    0.99       6.5 +/-    0.99  0.050 / 0.040
G31     55.1           14.4                1.4 +/-    3.46       3.5 +/-    3.46  0.040 / 0.030