PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/08/20-23:12:40
G10     248.4          23.9               12.3 +/-    0.98      24.5 +/-    0.98  0.030 / 0.050
G13     57.2           32.7                9.9 +/-    1.26      16.4 +/-    1.26  0.040 / 0.050
G15     94.4           58.2               12.2 +/-    0.33      14.1 +/-    0.33  0.290 / 0.340
G16     300.5          14.4                6.5 +/-    3.97      16.3 +/-    3.97  0.240 / 0.330
G18     264.8          53.7               10.4 +/-    2.56      12.5 +/-    2.56  0.090 / 0.310
G20     41.7           49.8                9.8 +/-    1.21      12.4 +/-    1.21  0.090 / 0.360
G21     330.8          58.8               10.2 +/-    0.65      11.7 +/-    0.65  0.030 / 0.050
G26     272.7          16.3               12.0 +/-    2.03      28.9 +/-    2.03  0.040 / 0.050
G29     162.9          49.8               12.7 +/-    0.42      16.1 +/-    0.42  0.050 / 0.110