PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/12/11-15:28:00
G10     247.5          23.4                5.8 +/-    2.51      11.7 +/-    2.51  0.040 / 0.050
G13     58.0           32.9                4.6 +/-    0.93       7.5 +/-    0.93  0.040 / 0.040
G15     91.4           57.0                7.4 +/-    0.35       8.7 +/-    0.35  0.030 / 0.060
G16     303.6          13.6                4.3 +/-    1.87      11.0 +/-    1.87  0.040 / 0.070
G18     265.5          55.4                7.1 +/-    1.12       8.4 +/-    1.12  0.130 / 0.400
G20     37.9           54.3                3.5 +/-    0.62       4.2 +/-    0.62  0.140 / 0.350
G21     336.9          61.5                5.0 +/-    0.71       5.6 +/-    0.71  0.060 / 0.100
G26     274.0          16.6                6.8 +/-    2.18      16.3 +/-    2.18  0.040 / 0.130
G29     161.5          49.5                8.1 +/-    0.83      10.2 +/-    0.83  0.140 / 0.310