PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/07/20-00:57:40
G10     261.5          34.8               13.6 +/-    1.45      21.7 +/-    1.45  0.140 / 0.230
G13     44.7           22.2                9.5 +/-    1.28      19.9 +/-    1.28  0.140 / 0.190
G15     68.1           54.4               10.3 +/-    0.74      12.3 +/-    0.74  0.040 / 0.030
G16     282.6          13.9                9.8 +/-    1.99      25.1 +/-    1.99  0.050 / 0.030
G20     272.6          43.3               16.2 +/-    1.94      22.3 +/-    1.94  0.200 / 0.330
G21     349.4          67.9               11.0 +/-    0.83      11.8 +/-    0.83  0.260 / 0.280
G24     123.5          11.2               15.0 +/-    1.89      40.8 +/-    1.89  0.190 / 0.370
G27     320.7          14.6                8.0 +/-    2.62      20.1 +/-    2.62  0.160 / 0.460
G29     167.7          37.9               11.5 +/-    1.25      17.3 +/-    1.25  0.210 / 0.230