PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/10/20-21:57:50
G08     294.6          23.1               11.7 +/-    1.06      23.9 +/-    1.06  0.100 / 0.120
G10     0.3            62.9               12.1 +/-    0.98      13.5 +/-    0.98  0.090 / 0.090
G14     228.2          45.5               17.4 +/-    1.38      23.3 +/-    1.38  0.060 / 0.090
G18     61.0           52.0               12.6 +/-    0.68      15.6 +/-    0.68  0.050 / 0.080
G21     144.4          39.9               17.4 +/-    1.31      25.4 +/-    1.31  0.050 / 0.040
G24     59.5           27.6               12.2 +/-    0.53      22.5 +/-    0.53  0.040 / 0.040
G27     255.2          32.6               13.9 +/-    1.17      23.1 +/-    1.17  0.050 / 0.100
G32     240.3          62.8               15.7 +/-    0.91      17.4 +/-    0.91  0.040 / 0.110