PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/09/27-21:28:10
G10     270.4          39.5               19.2 +/-    1.28      28.2 +/-    1.28  0.080 / 0.090
G13     41.1           17.2               18.1 +/-    1.97      42.7 +/-    1.97  0.080 / 0.050
G15     55.9           46.2               19.6 +/-    1.39      26.0 +/-    1.39  0.120 / 0.250
G18     308.9          65.5               20.8 +/-    0.99      22.6 +/-    0.99  0.110 / 0.210
G20     56.9           32.1               18.0 +/-    2.10      30.1 +/-    2.10  0.040 / 0.040
G21     18.2           74.4               19.3 +/-    1.03      19.9 +/-    1.03  0.030 / 0.030
G24     118.7          15.9               22.0 +/-    1.94      53.5 +/-    1.94  0.090 / 0.140
G27     316.0          22.8               17.8 +/-    1.46      36.5 +/-    1.46  0.070 / 0.110
G29     166.4          23.4               21.9 +/-    1.14      44.5 +/-    1.14  0.090 / 0.130