PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/10/17-17:12:40
G02     68.5           25.2                9.8 +/-    1.73      19.1 +/-    1.73  0.030 / 0.050
G05     49.1           54.3                8.2 +/-    0.27       9.8 +/-    0.27  0.030 / 0.040
G12     183.6          22.2               10.8 +/-    2.07      22.6 +/-    2.07  0.070 / 0.200
G13     121.0          22.4               12.5 +/-    1.24      26.0 +/-    1.24  0.100 / 0.250
G15     157.4          20.9               12.4 +/-    2.36      26.8 +/-    2.36  0.050 / 0.150
G20     216.5          71.5               11.6 +/-    0.79      12.2 +/-    0.79  0.050 / 0.150
G21     280.9          25.9               10.5 +/-    1.52      20.1 +/-    1.52  0.040 / 0.060
G25     221.2          42.5               12.1 +/-    1.51      16.9 +/-    1.51  0.040 / 0.050
G29     343.8          70.4                9.7 +/-    0.61      10.3 +/-    0.61  0.050 / 0.090