PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/08/31-20:27:50
G02     68.5           26.2               14.7 +/-    1.57      27.9 +/-    1.57  0.050 / 0.080
G12     182.6          20.2               20.8 +/-    3.21      45.5 +/-    3.21  0.060 / 0.090
G13     120.2          23.2               21.9 +/-    1.83      44.7 +/-    1.83  0.120 / 0.190
G15     158.0          21.1               23.2 +/-    2.69      49.6 +/-    2.69  0.080 / 0.200
G18     221.8          10.8               -4.5 +/-   27.54     -12.3 +/-   27.54  0.140 / 0.160
G20     217.1          74.3               19.0 +/-    0.62      19.7 +/-    0.62  0.070 / 0.220
G21     281.0          25.2               16.8 +/-    1.21      32.7 +/-    1.21  0.310 / 0.540
G25     217.7          40.6               20.1 +/-    0.93      29.0 +/-    0.93  0.030 / 0.040
G29     340.7          69.5               16.3 +/-    0.94      17.2 +/-    0.94  0.030 / 0.040