PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/08/25-21:58:00
G10     249.7          26.2               24.8 +/-    1.69      47.2 +/-    1.69  0.040 / 0.040
G13     54.3           30.3               17.0 +/-    1.72      29.5 +/-    1.72  0.030 / 0.040
G15     95.3           59.4               19.1 +/-    0.54      21.9 +/-    0.54  0.140 / 0.350
G16     294.9          16.2               17.9 +/-    2.20      43.3 +/-    2.20  0.150 / 0.380
G20     252.4          15.5               11.0 +/-    2.68      27.0 +/-    2.68  0.070 / 0.130
G21     331.0          58.6               18.6 +/-    0.58      21.4 +/-    0.58  0.110 / 0.150
G26     267.1          16.1               22.7 +/-    1.48      54.9 +/-    1.48  0.030 / 0.030
G29     165.0          52.5               20.6 +/-    0.73      25.2 +/-    0.73  0.040 / 0.040