PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/09/22-20:12:30
G10     253.6          29.4                9.9 +/-    2.58      17.6 +/-    2.58  0.050 / 0.040
G13     50.5           27.6                7.0 +/-    2.27      12.9 +/-    2.27  0.050 / 0.050
G15     87.9           59.7                8.8 +/-    0.73      10.0 +/-    0.73  0.120 / 0.400
G16     291.7          15.4                6.3 +/-    1.47      15.7 +/-    1.47  0.110 / 0.430
G20     274.6          53.0                8.8 +/-    3.57      10.7 +/-    3.57  0.110 / 0.210
G21     338.6          62.6                8.5 +/-    1.07       9.5 +/-    1.07  0.090 / 0.230
G26     264.5          14.2                7.9 +/-    1.71      20.0 +/-    1.71  0.030 / 0.040
G29     165.6          46.6                9.6 +/-    0.83      12.6 +/-    0.83  0.020 / 0.030