PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/08/20-22:58:00
G10     266.6          38.1               12.1 +/-    1.28      18.2 +/-    1.28  0.140 / 0.160
G13     42.0           18.4                9.8 +/-    2.85      22.4 +/-    2.85  0.160 / 0.170
G15     62.5           52.3               10.2 +/-    0.84      12.5 +/-    0.84  0.040 / 0.050
G16     277.6          12.5               10.9 +/-    1.32      28.7 +/-    1.32  0.040 / 0.040
G20     267.8          29.8                6.2 +/-    0.80      11.0 +/-    0.80  0.160 / 0.340
G21     358.6          71.1               11.2 +/-    0.69      11.7 +/-    0.69  0.160 / 0.470
G24     119.1          14.1               12.5 +/-    2.17      31.7 +/-    2.17  0.120 / 0.280
G27     319.0          18.3               10.7 +/-    1.68      24.6 +/-    1.68  0.130 / 0.290
G29     168.3          32.8               12.6 +/-    1.06      20.8 +/-    1.06  0.270 / 0.260