PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/07/04-09:58:00
G03     233.2          66.7                4.6 +/-    0.67       5.0 +/-    0.67  0.130 / 0.300
G09     305.3          21.3                2.6 +/-    3.67       5.6 +/-    3.67  0.110 / 0.340
G14     100.8          15.3                3.6 +/-    2.78       9.0 +/-    2.78  0.040 / 0.040
G16     116.7          60.8                6.8 +/-    0.33       7.7 +/-    0.33  0.040 / 0.040
G22     191.9          51.9                5.7 +/-    0.77       7.1 +/-    0.77  0.040 / 0.050
G23     322.7          52.6                4.2 +/-    0.63       5.1 +/-    0.63  0.040 / 0.060
G26     63.3           48.6                4.8 +/-    0.98       6.1 +/-    0.98  0.180 / 0.210
G31     54.2           15.7                2.5 +/-    3.87       6.0 +/-    3.87  0.140 / 0.220