PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/08/18-23:42:40
G10     286.4          47.8                5.6 +/-    1.25       7.2 +/-    1.25  0.090 / 0.120
G15     49.1           38.6                6.2 +/-    0.69       9.2 +/-    0.69  0.070 / 0.120
G20     284.7          41.3                4.7 +/-    1.17       6.6 +/-    1.17  0.040 / 0.050
G21     59.2           77.7                8.2 +/-    0.32       8.4 +/-    0.32  0.040 / 0.050
G24     104.0          23.0                8.5 +/-    1.53      17.5 +/-    1.53  0.080 / 0.250
G27     308.4          30.0                6.8 +/-    1.79      11.9 +/-    1.79  0.070 / 0.210
G29     169.0          16.0               10.0 +/-    1.68      24.2 +/-    1.68  0.040 / 0.060
G32     207.3          26.0                7.3 +/-    1.58      13.9 +/-    1.58  0.050 / 0.060