PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/04/27-23:42:50
G02     208.8          51.1               13.9 +/-    0.95      17.2 +/-    0.95  0.090 / 0.120
G06     102.3          79.5               10.8 +/-    0.17      10.9 +/-    0.17  0.110 / 0.110
G12     314.9          27.2                8.7 +/-    1.55      16.1 +/-    1.55  0.090 / 0.220
G17     46.0           42.3                9.7 +/-    1.16      13.6 +/-    1.16  0.120 / 0.250
G19     25.2           56.5               10.5 +/-    1.14      12.3 +/-    1.14  0.030 / 0.020
G24     279.3          42.3               10.1 +/-    1.58      14.2 +/-    1.58  0.040 / 0.020
G28     115.6          20.6               11.7 +/-    1.35      25.4 +/-    1.35  0.070 / 0.080