PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/07/31-08:12:30
G03     230.0          65.3                6.9 +/-    0.93       7.5 +/-    0.93  0.050 / 0.060
G09     306.9          23.9                4.4 +/-    0.70       8.8 +/-    0.70  0.050 / 0.050
G14     103.0          12.8                3.0 +/-    1.69       7.8 +/-    1.69  0.110 / 0.280
G16     110.4          61.9                6.0 +/-    0.35       6.7 +/-    0.35  0.150 / 0.310
G22     192.5          50.3                7.3 +/-    1.05       9.1 +/-    1.05  0.040 / 0.040
G23     323.5          53.4                5.3 +/-    0.51       6.5 +/-    0.51  0.040 / 0.050
G26     60.3           47.1                4.6 +/-    0.67       6.0 +/-    0.67  0.040 / 0.050
G31     55.5           14.0                1.6 +/-    1.76       4.0 +/-    1.76  0.050 / 0.050