PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/09/16-21:42:40
G10     285.9          47.7                9.1 +/-    2.52      11.8 +/-    2.52  0.040 / 0.040
G15     49.9           40.8                7.2 +/-    0.77      10.4 +/-    0.77  0.040 / 0.090
G20     331.9          65.0                8.3 +/-    0.62       9.0 +/-    0.62  0.090 / 0.120
G21     62.0           77.2                9.4 +/-    0.44       9.6 +/-    0.44  0.070 / 0.110
G24     103.6          22.8                9.7 +/-    0.84      19.9 +/-    0.84  0.090 / 0.170
G27     309.3          29.1                7.5 +/-    1.10      13.4 +/-    1.10  0.090 / 0.180
G29     168.7          15.8               11.2 +/-    1.83      27.2 +/-    1.83  0.060 / 0.060
G32     207.3          24.9               12.4 +/-    1.56      24.3 +/-    1.56  0.070 / 0.050