PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/07/29-08:27:50
G01     227.5          18.4                4.0 +/-    2.59       9.1 +/-    2.59  0.150 / 0.280
G03     295.0          64.2                6.0 +/-    0.80       6.6 +/-    0.80  0.130 / 0.170
G14     85.8           23.8                2.2 +/-    2.73       4.5 +/-    2.73  0.100 / 0.090
G16     149.8          42.9                6.3 +/-    1.16       8.8 +/-    1.16  0.120 / 0.100
G22     218.1          72.3                5.6 +/-    0.51       5.9 +/-    0.51  0.030 / 0.030
G23     305.0          34.7                4.2 +/-    1.65       6.6 +/-    1.65  0.030 / 0.030
G26     103.7          54.0                6.6 +/-    0.54       7.9 +/-    0.54  0.040 / 0.050
G31     44.2           34.2                2.9 +/-    1.59       4.7 +/-    1.59  0.040 / 0.070