PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/08/12-22:13:00
G10     258.3          34.0                9.0 +/-    2.16      14.5 +/-    2.16  0.150 / 0.470
G13     46.4           23.6                7.8 +/-    1.71      15.9 +/-    1.71  0.130 / 0.440
G15     71.0           54.6                9.1 +/-    0.52      10.9 +/-    0.52  0.040 / 0.050
G16     287.6          14.8                5.6 +/-    2.06      14.0 +/-    2.06  0.050 / 0.040
G20     282.6          55.9                9.5 +/-    2.07      11.3 +/-    2.07  0.070 / 0.190
G21     344.6          65.3                8.5 +/-    0.99       9.3 +/-    0.99  0.080 / 0.210
G26     260.7          12.0                9.6 +/-    5.60      25.7 +/-    5.60  0.030 / 0.040
G27     321.9          11.3               -4.5 +/-   30.77     -12.3 +/-   30.77  0.040 / 0.040
G29     165.5          40.7                9.6 +/-    0.86      13.8 +/-    0.86  0.250 / 0.360