PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/19-13:12:30
G03     222.5          64.1                8.6 +/-    1.52       9.5 +/-    1.52  0.180 / 0.340
G09     306.5          22.3                7.0 +/-    1.33      14.6 +/-    1.33  0.220 / 0.350
G14     102.6          15.0                6.9 +/-    1.92      17.1 +/-    1.92  0.050 / 0.040
G16     110.9          62.4                9.6 +/-    0.67      10.6 +/-    0.67  0.050 / 0.030
G22     187.5          46.7                9.2 +/-    0.61      12.2 +/-    0.61  0.040 / 0.050
G23     328.0          57.3                7.5 +/-    0.67       8.7 +/-    0.67  0.040 / 0.050
G26     59.7           46.9                6.4 +/-    1.04       8.4 +/-    1.04  0.050 / 0.050
G31     55.8           13.6                5.6 +/-    4.03      14.4 +/-    4.03  0.040 / 0.050