PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/12/22-19:43:10
G01     309.5          31.2                7.9 +/-    0.98      13.6 +/-    0.98  0.090 / 0.120
G10     102.7          42.7                9.6 +/-    0.67      13.3 +/-    0.67  0.110 / 0.110
G11     286.1          27.8                6.1 +/-    1.29      11.1 +/-    1.29  0.030 / 0.030
G14     350.0          68.1                6.5 +/-    0.33       6.9 +/-    0.33  0.030 / 0.020
G18     115.8          14.9               10.8 +/-    3.64      26.8 +/-    3.64  0.080 / 0.160
G22     308.4          23.1                7.8 +/-    1.73      15.9 +/-    1.73  0.100 / 0.160
G25     84.9           15.7               10.2 +/-    1.44      24.9 +/-    1.44  0.030 / 0.030
G31     171.5          60.6               10.5 +/-    0.62      11.9 +/-    0.62  0.030 / 0.030
G32     32.0           55.1                6.7 +/-    1.03       8.0 +/-    1.03  0.060 / 0.020