PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/07/20-01:42:50
G10     284.7          47.1               13.0 +/-    1.01      17.0 +/-    1.01  0.090 / 0.130
G15     49.3           38.6                8.5 +/-    0.66      12.7 +/-    0.66  0.070 / 0.130
G20     299.5          55.1                9.9 +/-    0.78      11.8 +/-    0.78  0.050 / 0.040
G21     54.2           77.6               10.8 +/-    0.65      11.1 +/-    0.65  0.040 / 0.030
G24     105.7          22.4               13.5 +/-    1.66      28.0 +/-    1.66  0.040 / 0.060
G27     309.3          29.3                8.9 +/-    1.76      15.7 +/-    1.76  0.050 / 0.050
G29     169.0          17.0               13.4 +/-    1.91      31.7 +/-    1.91  0.080 / 0.220
G32     207.0          24.8               14.1 +/-    1.63      27.7 +/-    1.63  0.090 / 0.180