PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/07/28-04:27:40
G01     316.5          23.3                5.4 +/-    1.04      11.0 +/-    1.04  0.160 / 0.250
G10     89.5           49.2                6.4 +/-    1.31       8.2 +/-    1.31  0.390 / 0.250
G11     296.4          25.9                7.8 +/-    1.21      14.9 +/-    1.21  0.080 / 0.110
G14     312.2          70.5                6.7 +/-    0.79       7.0 +/-    0.79  0.150 / 0.170
G18     297.6          44.6                6.8 +/-    6.67       9.1 +/-    6.67  0.150 / 0.260
G20     103.2          44.4               15.7 +/-    1.43      21.4 +/-    1.43  0.120 / 0.230
G22     304.1          15.5                5.9 +/-    2.98      14.5 +/-    2.98  0.050 / 0.040
G25     95.0           11.3               -0.9 +/-   25.99      -2.5 +/-   25.99  0.050 / 0.050
G31     171.6          51.3                9.1 +/-    0.81      11.3 +/-    0.81  0.150 / 0.240
G32     22.0           61.3                7.5 +/-    1.60       8.4 +/-    1.60  0.110 / 0.190