PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/12/17-20:27:40
G01     299.4          37.4               11.1 +/-    2.60      16.9 +/-    2.60  0.060 / 0.130
G03     309.2          11.4               -0.8 +/-   41.32      -2.1 +/-   41.32  0.080 / 0.110
G10     113.5          34.9               11.4 +/-    1.28      18.2 +/-    1.28  0.080 / 0.140
G11     273.9          27.7               12.6 +/-    1.46      23.2 +/-    1.46  0.110 / 0.140
G14     12.7           62.8               10.0 +/-    0.83      11.1 +/-    0.83  0.030 / 0.020
G22     312.0          31.6               12.4 +/-    1.51      20.9 +/-    1.51  0.020 / 0.020
G25     74.0           18.3                9.7 +/-    1.34      22.3 +/-    1.34  0.050 / 0.040
G31     160.9          72.2               13.6 +/-    0.39      14.2 +/-    0.39  0.040 / 0.050
G32     43.4           47.6                9.6 +/-    0.68      12.5 +/-    0.68  0.030 / 0.040