PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/07/22-08:27:40
G03     256.5          69.6                5.3 +/-    1.10       5.6 +/-    1.10  0.030 / 0.040
G09     301.2          16.4                5.5 +/-    2.78      13.1 +/-    2.78  0.030 / 0.050
G14     95.0           19.4                5.0 +/-    1.83      11.1 +/-    1.83  0.040 / 0.070
G16     130.0          55.8                8.6 +/-    0.57      10.1 +/-    0.57  0.060 / 0.060
G22     198.7          60.2                7.3 +/-    0.39       8.3 +/-    0.39  0.120 / 0.240
G23     316.1          46.0                6.2 +/-    0.70       8.3 +/-    0.70  0.120 / 0.270
G26     74.2           52.1                6.9 +/-    0.91       8.5 +/-    0.91  0.030 / 0.050
G31     50.5           21.3                3.6 +/-    2.75       7.6 +/-    2.75  0.030 / 0.040