PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/31-04:27:50
G10     264.0          36.2               11.8 +/-    1.76      18.4 +/-    1.76  0.100 / 0.290
G13     43.4           20.6                7.5 +/-    3.79      16.3 +/-    3.79  0.210 / 0.310
G15     62.9           51.2                7.5 +/-    0.93       9.3 +/-    0.93  0.050 / 0.040
G16     280.8          13.0               11.9 +/-    1.84      31.0 +/-    1.84  0.050 / 0.040
G20     316.6          67.0                7.7 +/-    0.54       8.3 +/-    0.54  0.190 / 0.250
G21     354.8          69.7                8.1 +/-    0.68       8.6 +/-    0.68  0.170 / 0.210
G24     122.3          12.6                5.6 +/-    2.19      14.7 +/-    2.19  0.130 / 0.180
G27     319.7          16.8               10.9 +/-    2.25      26.0 +/-    2.25  0.090 / 0.380
G29     168.0          34.9                7.9 +/-    0.97      12.6 +/-    0.97  0.180 / 0.270