PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/11/21-15:57:40
G10     250.0          26.7                8.6 +/-    1.35      16.1 +/-    1.35  0.110 / 0.530
G13     54.0           29.9                2.4 +/-    1.67       4.3 +/-    1.67  0.100 / 0.520
G15     91.6           58.7                8.5 +/-    1.00       9.8 +/-    1.00  0.030 / 0.040
G16     297.3          15.2                4.1 +/-    1.51      10.2 +/-    1.51  0.040 / 0.050
G20     269.0          50.4                8.8 +/-    2.56      11.0 +/-    2.56  0.030 / 0.030
G21     336.3          61.2                7.8 +/-    0.75       8.8 +/-    0.75  0.030 / 0.030
G26     270.4          15.6                8.3 +/-    2.72      20.3 +/-    2.72  0.090 / 0.130
G29     163.5          50.0               10.5 +/-    0.46      13.3 +/-    0.46  0.080 / 0.130