PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/23-04:28:00
G10     250.2          26.2                8.9 +/-    1.58      16.9 +/-    1.58  0.140 / 0.730
G13     54.1           30.3                5.9 +/-    1.15      10.2 +/-    1.15  0.130 / 0.690
G15     87.5           57.6                7.1 +/-    0.42       8.3 +/-    0.42  0.040 / 0.060
G16     295.3          15.7                5.8 +/-    2.35      14.2 +/-    2.35  0.030 / 0.050
G20     289.8          65.3                5.3 +/-    0.62       5.8 +/-    0.62  0.090 / 0.130
G21     332.5          59.6                6.2 +/-    1.35       7.1 +/-    1.35  0.100 / 0.150
G26     266.8          15.8               10.3 +/-    2.76      25.1 +/-    2.76  0.070 / 0.150
G29     165.1          51.1                7.1 +/-    0.66       8.8 +/-    0.66  0.050 / 0.140