PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/08/21-22:43:10
G10     262.0          35.2               11.2 +/-    1.14      17.7 +/-    1.14  0.110 / 0.210
G13     44.3           21.7                7.9 +/-    2.66      16.8 +/-    2.66  0.140 / 0.210
G15     68.9           55.2                8.8 +/-    0.36      10.5 +/-    0.36  0.040 / 0.040
G16     281.8          13.9                7.4 +/-    1.54      18.8 +/-    1.54  0.040 / 0.030
G20     263.7          26.4                5.4 +/-    1.73      10.1 +/-    1.73  0.350 / 0.310
G21     349.7          68.0                9.0 +/-    0.79       9.6 +/-    0.79  0.140 / 0.320
G24     122.7          11.6               10.1 +/-    1.77      27.3 +/-    1.77  0.160 / 0.370
G27     320.7          14.7                6.5 +/-    2.47      16.3 +/-    2.47  0.160 / 0.450
G29     167.8          37.6                9.1 +/-    1.03      13.8 +/-    1.03  0.230 / 0.220