PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/09/21-20:43:10
G10     265.3          37.4               11.5 +/-    1.81      17.4 +/-    1.81  0.040 / 0.030
G13     42.6           19.3                7.5 +/-    1.87      16.8 +/-    1.87  0.040 / 0.040
G15     65.6           54.5                9.2 +/-    0.78      11.0 +/-    0.78  0.130 / 0.320
G16     280.0          12.7                9.1 +/-    2.67      24.0 +/-    2.67  0.150 / 0.420
G20     294.5          59.6                9.3 +/-    0.77      10.6 +/-    0.77  0.250 / 0.270
G21     359.5          70.8               10.3 +/-    1.04      10.9 +/-    1.04  0.170 / 0.230
G24     119.2          13.6               10.6 +/-    2.03      27.3 +/-    2.03  0.150 / 0.270
G27     319.8          16.6                9.4 +/-    2.32      22.4 +/-    2.32  0.130 / 0.290
G29     167.8          33.4               11.6 +/-    1.18      18.9 +/-    1.18  0.210 / 0.260