PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/08/25-21:57:30
G10     249.7          26.2               25.1 +/-    1.94      47.7 +/-    1.94  0.060 / 0.060
G13     54.3           30.3               15.5 +/-    1.49      27.0 +/-    1.49  0.040 / 0.060
G15     95.3           59.4               18.8 +/-    0.63      21.4 +/-    0.63  0.070 / 0.180
G16     294.9          16.2               17.8 +/-    2.05      43.0 +/-    2.05  0.060 / 0.150
G20     252.4          15.5                9.3 +/-    0.99      22.9 +/-    0.99  0.110 / 0.790
G21     331.0          58.6               17.1 +/-    0.71      19.7 +/-    0.71  0.120 / 0.760
G26     267.1          16.1               22.6 +/-    2.59      54.7 +/-    2.59  0.030 / 0.030
G29     165.0          52.5               19.2 +/-    1.19      23.5 +/-    1.19  0.030 / 0.030