PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/11/20-17:27:20
G10     293.0          50.5                7.3 +/-    2.93       9.2 +/-    2.93  0.030 / 0.030
G15     47.2           33.2                7.2 +/-    0.86      11.8 +/-    0.86  0.030 / 0.030
G20     344.5          65.4                8.1 +/-    0.34       8.8 +/-    0.34  0.080 / 0.130
G21     89.6           74.1                8.7 +/-    0.25       9.0 +/-    0.25  0.080 / 0.150
G24     96.6           24.8               11.0 +/-    1.45      21.7 +/-    1.45  0.120 / 0.340
G27     305.6          31.2                7.9 +/-    1.57      13.6 +/-    1.57  0.120 / 0.350
G29     167.7          10.0               11.3 +/-    3.58      31.5 +/-    3.58  0.080 / 0.070
G32     209.2          28.5               10.3 +/-    1.88      18.7 +/-    1.88  0.060 / 0.110