PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/08/07-09:27:50
G03     191.8          21.2                6.8 +/-    0.92      14.5 +/-    0.92  0.190 / 0.390
G07     291.4          38.1                4.1 +/-    2.00       6.1 +/-    2.00  0.150 / 0.380
G08     139.2          29.5                7.0 +/-    1.18      12.3 +/-    1.18  0.060 / 0.090
G09     321.3          66.8                1.8 +/-    1.00       1.9 +/-    1.00  0.050 / 0.060
G16     42.3           35.1                2.7 +/-    0.93       4.3 +/-    0.93  0.050 / 0.090
G23     118.3          78.6                5.0 +/-    0.60       5.1 +/-    0.60  0.040 / 0.080
G27     98.7           34.2                5.6 +/-    1.18       9.1 +/-    1.18  0.060 / 0.100
G30     274.0          12.1                4.6 +/-   13.33      12.3 +/-   13.33  0.050 / 0.110