PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/09/27-20:28:00
G10     269.5          39.9                9.9 +/-    1.30      14.4 +/-    1.30  0.040 / 0.030
G13     40.8           16.3                8.1 +/-    1.70      19.5 +/-    1.70  0.040 / 0.030
G15     60.3           51.5                9.0 +/-    0.70      11.1 +/-    0.70  0.150 / 0.190
G16     276.5          11.4                3.2 +/-   20.19       8.6 +/-   20.19  0.150 / 0.220
G20     301.9          61.3                9.1 +/-    0.81      10.2 +/-    0.81  0.320 / 0.430
G21     9.7            73.2               10.4 +/-    0.60      10.8 +/-    0.60  0.150 / 0.350
G24     115.8          15.8               11.6 +/-    1.63      28.4 +/-    1.63  0.170 / 0.280
G27     318.2          19.6                7.7 +/-    2.01      17.1 +/-    2.01  0.190 / 0.210
G29     168.1          29.2               11.3 +/-    1.86      20.1 +/-    1.86  0.150 / 0.260
G32     204.4          12.0                5.3 +/-   31.19      14.2 +/-   31.19  0.110 / 0.380