PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/09/21-20:43:00
G10     264.9          37.1               11.7 +/-    1.44      17.9 +/-    1.44  0.130 / 0.290
G13     42.8           19.6                8.5 +/-    0.92      19.0 +/-    0.92  0.120 / 0.170
G15     66.3           54.8                9.8 +/-    0.56      11.7 +/-    0.56  0.050 / 0.050
G16     280.4          12.9                9.1 +/-    1.06      23.9 +/-    1.06  0.040 / 0.050
G20     293.6          59.4               10.6 +/-    0.85      12.1 +/-    0.85  0.160 / 0.340
G21     358.5          70.6               11.2 +/-    0.47      11.8 +/-    0.47  0.190 / 0.410
G24     119.6          13.3               11.6 +/-    2.17      29.9 +/-    2.17  0.150 / 0.390
G27     320.0          16.3                9.0 +/-    1.54      21.6 +/-    1.54  0.120 / 0.390
G29     167.7          33.8               12.3 +/-    1.19      19.9 +/-    1.19  0.070 / 0.230