PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/09/28-20:57:40
G10     258.1          31.7               20.3 +/-    2.24      34.4 +/-    2.24  0.150 / 0.130
G13     47.7           26.1               10.6 +/-    1.44      20.2 +/-    1.44  0.110 / 0.110
G15     70.9           54.3               12.7 +/-    0.86      15.2 +/-    0.86  0.030 / 0.030
G16     291.3          13.2               18.1 +/-    1.32      47.1 +/-    1.32  0.030 / 0.040
G18     283.7          61.0               15.6 +/-    1.33      17.5 +/-    1.33  0.270 / 0.370
G20     48.6           41.5               11.2 +/-    1.00      15.9 +/-    1.00  0.240 / 0.390
G21     348.9          67.3               15.7 +/-    1.04      16.9 +/-    1.04  0.120 / 0.250
G26     264.2          11.8               21.5 +/-    4.46      57.5 +/-    4.46  0.090 / 0.260
G27     321.1          13.3               15.7 +/-    1.97      40.6 +/-    1.97  0.050 / 0.070
G29     164.8          36.0               16.7 +/-    0.48      26.1 +/-    0.48  0.060 / 0.090