PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/04/23-22:28:00
G01     40.8           15.9               10.2 +/-    1.36      24.9 +/-    1.36  0.110 / 0.260
G02     199.0          9.8                -0.7 +/-   18.35      -1.8 +/-   18.35  0.100 / 0.320
G06     174.5          40.3               18.3 +/-    1.06      26.5 +/-    1.06  0.120 / 0.370
G13     237.3          21.5               21.3 +/-    2.03      45.1 +/-    2.03  0.110 / 0.340
G15     270.2          12.0               17.7 +/-    1.17      47.3 +/-    1.17  0.140 / 0.300
G17     350.2          72.1               13.9 +/-    0.71      14.5 +/-    0.71  0.130 / 0.330
G19     277.9          68.7               13.2 +/-    0.43      14.0 +/-    0.43  0.050 / 0.070
G24     316.3          19.8               11.3 +/-    2.11      25.0 +/-    2.11  0.050 / 0.070
G28     73.1           46.2               12.8 +/-    1.38      17.0 +/-    1.38  0.070 / 0.070
G30     154.4          25.3               17.0 +/-    1.04      33.0 +/-    1.04  0.070 / 0.080