PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/04/06-07:57:30
G10     257.2          31.5                7.7 +/-    1.49      13.0 +/-    1.49  0.030 / 0.040
G13     47.8           25.8                5.5 +/-    1.90      10.6 +/-    1.90  0.030 / 0.030
G15     71.2           54.1                6.6 +/-    0.33       8.0 +/-    0.33  0.080 / 0.220
G16     288.4          14.5                4.0 +/-    1.43      10.0 +/-    1.43  0.090 / 0.200
G20     24.4           62.6                5.5 +/-    0.77       6.1 +/-    0.77  0.050 / 0.040
G21     345.0          65.8                5.9 +/-    0.63       6.4 +/-    0.63  0.040 / 0.040
G26     260.1          12.4                6.3 +/-    1.91      16.8 +/-    1.91  0.430 / 0.460
G27     321.7          11.7               -5.4 +/-   18.96     -14.6 +/-   18.96  0.290 / 0.270
G29     166.5          41.4                6.1 +/-    0.67       8.7 +/-    0.67  0.150 / 0.170