PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/07/20-06:43:00
G01     235.4          26.8                4.9 +/-    1.82       9.1 +/-    1.82  0.050 / 0.110
G03     309.4          57.9                5.5 +/-    1.39       6.4 +/-    1.39  0.060 / 0.110
G14     73.3           33.1                4.3 +/-    1.86       7.0 +/-    1.86  0.090 / 0.120
G16     155.5          31.1                7.0 +/-    2.07      12.0 +/-    2.07  0.090 / 0.110
G18     210.5          16.1                3.6 +/-    2.05       8.8 +/-    2.05  0.050 / 0.030
G22     267.8          75.0                6.7 +/-    1.04       6.9 +/-    1.04  0.040 / 0.030
G23     299.5          32.3                5.7 +/-    2.54       9.5 +/-    2.54  0.130 / 0.240
G26     120.5          48.4                7.1 +/-    0.39       9.1 +/-    0.39  0.080 / 0.210
G31     42.0           43.0                4.2 +/-    0.87       5.8 +/-    0.87  0.040 / 0.050
G32     87.9           15.4                4.2 +/-    3.10      10.3 +/-    3.10  0.040 / 0.040