PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/09/14-19:57:40
G10     258.4          34.2                8.6 +/-    2.22      13.9 +/-    2.22  0.040 / 0.040
G13     46.4           23.4                8.0 +/-    2.25      16.3 +/-    2.25  0.050 / 0.050
G15     71.2           54.9                9.1 +/-    0.57      10.8 +/-    0.57  0.070 / 0.180
G16     287.0          14.9                6.6 +/-    2.60      16.5 +/-    2.60  0.130 / 0.210
G20     283.8          56.6                8.0 +/-    2.56       9.4 +/-    2.56  0.040 / 0.040
G21     344.8          65.3                9.6 +/-    0.73      10.5 +/-    0.73  0.040 / 0.040
G26     260.4          11.9                9.0 +/-    6.96      24.0 +/-    6.96  0.140 / 0.660
G27     321.9          11.5               -5.5 +/-   31.55     -14.9 +/-   31.55  0.130 / 0.450
G29     165.8          41.3               10.4 +/-    0.67      14.8 +/-    0.67  0.080 / 0.110