PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/09/21-00:27:50
G08     281.1          22.8               10.5 +/-    1.10      21.6 +/-    1.10  0.040 / 0.030
G10     27.9           62.9               10.8 +/-    1.22      11.9 +/-    1.22  0.020 / 0.030
G14     241.6          56.8               13.2 +/-    2.55      15.4 +/-    2.55  0.060 / 0.160
G18     75.6           45.8               12.0 +/-    0.73      16.0 +/-    0.73  0.070 / 0.150
G21     150.1          28.8               13.4 +/-    0.87      24.0 +/-    0.87  0.100 / 0.130
G24     48.9           21.6               10.2 +/-    2.28      21.6 +/-    2.28  0.070 / 0.130
G27     242.7          25.5               13.8 +/-    1.22      26.6 +/-    1.22  0.060 / 0.070
G31     182.9          13.6               12.8 +/-    0.85      32.8 +/-    0.85  0.050 / 0.080
G32     267.9          71.9               11.7 +/-    0.62      12.3 +/-    0.62  0.080 / 0.130