PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/12/26-21:12:50
G01     251.4          35.4               10.5 +/-    1.94      16.6 +/-    1.94  0.030 / 0.040
G03     315.9          44.0                7.7 +/-    0.96      10.5 +/-    0.96  0.040 / 0.030
G11     238.2          12.9                7.4 +/-    2.59      19.3 +/-    2.59  0.030 / 0.040
G14     60.1           41.0                7.7 +/-    1.52      11.1 +/-    1.52  0.030 / 0.040
G22     305.2          65.5                8.7 +/-    0.63       9.5 +/-    0.63  0.060 / 0.340
G23     286.3          18.9                8.4 +/-    1.55      19.0 +/-    1.55  0.070 / 0.390
G25     39.9           10.3                7.3 +/-    2.42      20.2 +/-    2.42  0.080 / 0.100
G26     138.1          37.4                9.9 +/-    0.39      15.1 +/-    0.39  0.050 / 0.090
G31     40.5           60.1                7.8 +/-    0.71       8.9 +/-    0.71  0.050 / 0.110
G32     77.0           23.5                8.5 +/-    1.62      17.2 +/-    1.62  0.070 / 0.110