PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/12/17-19:42:30
G01     315.7          24.2               10.4 +/-    1.92      20.6 +/-    1.92  0.190 / 0.280
G10     90.7           49.2               10.3 +/-    0.97      13.1 +/-    0.97  0.160 / 0.240
G11     296.3          25.8               11.2 +/-    1.81      21.4 +/-    1.81  0.160 / 0.230
G14     322.7          70.9               10.3 +/-    0.43      10.9 +/-    0.43  0.180 / 0.200
G18     108.8          22.0               11.1 +/-    0.94      23.3 +/-    0.94  0.040 / 0.050
G22     304.2          15.6               10.5 +/-    1.35      25.7 +/-    1.35  0.050 / 0.050
G25     94.1           12.0               12.7 +/-    2.29      33.9 +/-    2.29  0.050 / 0.040
G31     175.8          49.4               15.0 +/-    0.87      19.1 +/-    0.87  0.050 / 0.040
G32     19.1           62.3                9.4 +/-    0.83      10.4 +/-    0.83  0.040 / 0.020