PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/08/23-22:27:30
G13     46.5           24.2                6.6 +/-    5.78      13.2 +/-    5.78  0.040 / 0.170
G15     75.0           57.1                4.7 +/-   21.34       5.5 +/-   21.34  0.040 / 0.050
G16     285.2          14.8                7.1 +/-   24.16      17.9 +/-   24.16  0.110 / 0.290
G20     260.3          23.1                2.9 +/-   25.15       6.0 +/-   25.15  0.120 / 0.310
G21     343.9          65.6               -2.1 +/-   17.66      -2.3 +/-   17.66  0.060 / 0.210
G26     258.2          11.8               12.3 +/-   25.00      33.0 +/-   25.00  0.070 / 0.190
G27     321.7          11.9               -4.2 +/-   39.93     -11.2 +/-   39.93  0.040 / 0.170
G29     167.2          41.4               13.9 +/-   34.44      19.7 +/-   34.44  0.040 / 0.050