PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/08/27-21:42:50
G02     89.0           10.1               21.2 +/-    2.28      59.0 +/-    2.28  0.050 / 0.090
G05     45.4           30.7               20.3 +/-    0.79      35.0 +/-    0.79  0.050 / 0.080
G13     91.6           36.3               24.8 +/-    0.63      38.4 +/-    0.63  0.110 / 0.280
G15     139.1          43.9               27.4 +/-    0.99      37.5 +/-    0.99  0.130 / 0.270
G18     236.5          33.2               26.7 +/-    2.55      43.9 +/-    2.55  0.090 / 0.270
G20     17.2           76.0               22.6 +/-    0.75      23.3 +/-    0.75  0.080 / 0.250
G21     303.5          40.9               23.6 +/-    1.13      33.9 +/-    1.13  0.030 / 0.030
G25     201.5          17.1               28.2 +/-    2.14      66.8 +/-    2.14  0.020 / 0.030
G26     300.7          18.9               20.6 +/-    2.17      46.5 +/-    2.17  0.050 / 0.110
G29     138.2          80.6               22.1 +/-    0.87      22.4 +/-    0.87  0.040 / 0.120