PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/07/20-05:12:50
G01     313.4          27.5                6.3 +/-    2.07      11.6 +/-    2.07  0.130 / 0.230
G10     96.7           45.6                5.4 +/-    0.72       7.2 +/-    0.72  0.170 / 0.250
G11     290.7          27.3                6.7 +/-    1.73      12.5 +/-    1.73  0.110 / 0.110
G14     328.3          70.0                4.9 +/-    0.43       5.1 +/-    0.43  0.070 / 0.100
G18     290.4          47.4                5.3 +/-   10.05       6.9 +/-   10.05  0.070 / 0.190
G20     110.6          35.8               10.9 +/-    1.14      17.0 +/-    1.14  0.070 / 0.180
G22     306.7          20.0                6.7 +/-    1.69      14.7 +/-    1.69  0.040 / 0.060
G25     89.9           13.6                5.3 +/-    2.97      13.6 +/-    2.97  0.040 / 0.050
G31     168.9          57.6                6.9 +/-    0.75       8.0 +/-    0.75  0.170 / 0.250
G32     29.1           57.1                4.7 +/-    1.40       5.4 +/-    1.40  0.170 / 0.310