PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/10/13-17:57:40
G10     257.9          33.9                9.0 +/-    1.66      14.5 +/-    1.66  0.180 / 0.310
G13     46.7           23.8                7.5 +/-    0.93      15.1 +/-    0.93  0.150 / 0.360
G15     70.3           53.9                9.1 +/-    0.32      11.0 +/-    0.32  0.040 / 0.050
G20     283.9          57.0                9.7 +/-    0.85      11.3 +/-    0.85  0.040 / 0.050
G21     344.5          65.1                7.8 +/-    0.93       8.5 +/-    0.93  0.040 / 0.070
G26     261.0          12.2                9.6 +/-    1.58      25.4 +/-    1.58  0.050 / 0.070
G27     321.9          11.1               -4.9 +/-   34.47     -13.4 +/-   34.47  0.060 / 0.090
G29     165.8          42.3               11.5 +/-    0.69      16.2 +/-    0.69  0.070 / 0.120