PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/07/18-00:27:40
G10     246.2          23.0               11.4 +/-    1.98      23.3 +/-    1.98  0.050 / 0.050
G13     58.7           32.5               10.0 +/-    1.72      16.7 +/-    1.72  0.040 / 0.050
G15     101.7          58.5               12.1 +/-    0.33      14.0 +/-    0.33  0.060 / 0.130
G16     299.6          15.9                7.6 +/-    2.04      18.5 +/-    2.04  0.060 / 0.110
G20     255.7          32.8                8.9 +/-    4.13      14.8 +/-    4.13  0.110 / 0.370
G21     326.5          55.8                7.8 +/-    3.02       9.2 +/-    3.02  0.150 / 0.320
G26     271.4          17.7                9.8 +/-    1.42      22.9 +/-    1.42  0.030 / 0.030
G29     163.7          57.1               11.1 +/-    0.61      13.0 +/-    0.61  0.030 / 0.040