PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/09/25-19:58:10
G05     47.1           23.8               18.9 +/-    1.63      37.9 +/-    1.63  0.220 / 0.470
G13     82.9           37.4               17.3 +/-    0.94      26.3 +/-    0.94  0.150 / 0.490
G15     129.9          49.4               18.6 +/-    0.71      23.6 +/-    0.71  0.070 / 0.170
G18     242.0          39.3               19.6 +/-    1.49      28.8 +/-    1.49  0.080 / 0.190
G20     24.0           70.2               23.6 +/-    0.74      24.9 +/-    0.74  0.070 / 0.070
G21     310.3          45.8               16.5 +/-    0.93      22.0 +/-    0.93  0.070 / 0.080
G25     199.3          12.3               17.3 +/-    4.23      45.9 +/-    4.23  0.040 / 0.030
G26     295.4          19.0               18.3 +/-    1.19      41.3 +/-    1.19  0.050 / 0.030
G29     149.4          71.9               26.1 +/-    0.55      27.3 +/-    0.55  0.110 / 0.130