PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/08/18-21:13:10
G10     244.7          23.2               13.1 +/-    2.02      26.7 +/-    2.02  0.040 / 0.050
G13     59.9           32.2                8.4 +/-    1.17      14.1 +/-    1.17  0.040 / 0.050
G15     101.9          57.8               12.3 +/-    0.89      14.2 +/-    0.89  0.110 / 0.380
G16     302.7          15.4                7.6 +/-    2.89      18.6 +/-    2.89  0.130 / 0.410
G20     261.5          46.3               11.2 +/-    2.92      14.9 +/-    2.92  0.070 / 0.120
G21     325.3          54.5               10.9 +/-    0.67      13.1 +/-    0.67  0.060 / 0.140
G26     275.0          17.9               11.4 +/-    1.42      26.5 +/-    1.42  0.030 / 0.040
G29     160.8          58.3               11.4 +/-    0.47      13.1 +/-    0.47  0.030 / 0.040