PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/07/23-07:42:30
G01     232.1          22.5                6.3 +/-    2.23      13.0 +/-    2.23  0.030 / 0.030
G03     302.9          61.5                5.3 +/-    0.48       6.0 +/-    0.48  0.040 / 0.040
G14     78.7           30.6                4.1 +/-    0.70       7.0 +/-    0.70  0.080 / 0.130
G16     149.5          38.9                6.6 +/-    0.87       9.8 +/-    0.87  0.080 / 0.150
G18     207.8          12.2                3.0 +/-    2.75       7.9 +/-    2.75  0.060 / 0.090
G22     239.4          75.0                4.7 +/-    0.86       4.9 +/-    0.86  0.050 / 0.090
G23     302.2          32.8                5.5 +/-    1.10       9.1 +/-    1.10  0.040 / 0.050
G26     107.1          51.6                6.3 +/-    0.49       7.7 +/-    0.49  0.040 / 0.050
G31     43.3           36.7                2.8 +/-    0.44       4.3 +/-    0.44  0.130 / 0.270