PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/08/18-01:58:10
G08     303.4          21.7                5.3 +/-    2.55      11.3 +/-    2.55  0.050 / 0.070
G10     340.0          61.1                7.1 +/-    0.72       8.0 +/-    0.72  0.050 / 0.050
G14     221.2          37.4               13.5 +/-    1.15      20.5 +/-    1.15  0.070 / 0.090
G18     45.2           57.8                7.9 +/-    0.62       9.2 +/-    0.62  0.070 / 0.090
G21     138.4          51.7                9.7 +/-    0.59      12.0 +/-    0.59  0.040 / 0.030
G24     69.7           30.1                8.1 +/-    0.85      14.2 +/-    0.85  0.030 / 0.030
G27     266.3          36.4                9.4 +/-    0.98      14.6 +/-    0.98  0.050 / 0.130
G32     228.5          55.6                9.0 +/-    0.58      10.7 +/-    0.58  0.050 / 0.120