PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/09/16-19:57:50
G05     50.3           15.0                8.0 +/-    1.73      19.9 +/-    1.73  0.070 / 0.070
G10     239.6          16.6               11.9 +/-    2.48      28.4 +/-    2.48  0.060 / 0.060
G13     68.8           35.4                9.8 +/-    1.44      15.4 +/-    1.44  0.080 / 0.430
G15     125.5          55.0               10.0 +/-    0.68      11.9 +/-    0.68  0.090 / 0.400
G16     308.9          14.3                5.2 +/-    2.73      13.2 +/-    2.73  0.090 / 0.230
G20     253.0          40.8               10.3 +/-    2.50      14.8 +/-    2.50  0.120 / 0.190
G21     318.3          50.4                8.5 +/-    0.56      10.7 +/-    0.56  0.070 / 0.100
G26     281.7          19.8                7.1 +/-    1.96      15.7 +/-    1.96  0.080 / 0.090
G29     159.1          67.0               10.4 +/-    0.32      11.2 +/-    0.32  0.030 / 0.030