PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/09/16-21:43:00
G10     285.9          47.7                7.0 +/-    0.93       9.0 +/-    0.93  0.090 / 0.150
G15     49.9           40.8                7.4 +/-    0.93      10.6 +/-    0.93  0.080 / 0.140
G20     331.9          65.0                6.6 +/-    0.68       7.2 +/-    0.68  0.040 / 0.050
G21     62.0           77.2                9.4 +/-    0.63       9.7 +/-    0.63  0.040 / 0.040
G24     103.6          22.8               10.0 +/-    2.03      20.6 +/-    2.03  0.090 / 0.230
G27     309.3          29.1                7.2 +/-    1.46      12.8 +/-    1.46  0.080 / 0.220
G29     168.7          15.8               11.5 +/-    1.29      28.1 +/-    1.29  0.040 / 0.060
G32     207.3          24.9                9.4 +/-    1.59      18.4 +/-    1.59  0.040 / 0.060