PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/11/20-15:58:10
G10     248.8          25.7                9.5 +/-    1.51      18.2 +/-    1.51  0.030 / 0.050
G13     55.3           30.7                8.3 +/-    0.59      14.4 +/-    0.59  0.030 / 0.080
G15     94.7           58.8               10.2 +/-    0.35      11.7 +/-    0.35  0.150 / 0.670
G16     298.6          15.2                4.4 +/-    3.47      10.9 +/-    3.47  0.140 / 0.640
G20     267.1          49.5                8.8 +/-    0.83      11.2 +/-    0.83  0.040 / 0.050
G21     334.4          60.2                7.9 +/-    0.71       8.9 +/-    0.71  0.040 / 0.050
G26     271.7          16.1                8.8 +/-    1.69      21.2 +/-    1.69  0.060 / 0.140
G29     163.1          51.6               10.4 +/-    0.84      12.9 +/-    0.84  0.050 / 0.130