PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/12/07-22:27:50
G01     252.7          36.0                9.6 +/-    2.24      15.0 +/-    2.24  0.030 / 0.030
G03     316.1          42.1                7.4 +/-    0.83      10.5 +/-    0.83  0.030 / 0.030
G11     238.7          13.6                8.9 +/-    1.77      23.0 +/-    1.77  0.080 / 0.260
G14     59.2           41.3                6.3 +/-    1.68       9.0 +/-    1.68  0.110 / 0.250
G22     306.8          64.1                6.8 +/-    0.71       7.4 +/-    0.71  0.020 / 0.030
G23     285.2          17.8               10.1 +/-    1.56      23.5 +/-    1.56  0.030 / 0.030
G25     40.5           10.7                7.3 +/-    4.67      20.0 +/-    4.67  0.070 / 0.120
G26     140.2          36.0               10.4 +/-    0.73      16.3 +/-    0.73  0.090 / 0.090
G31     40.7           62.4                5.4 +/-    0.48       6.0 +/-    0.48  0.060 / 0.060
G32     75.7           24.7                7.2 +/-    1.92      14.3 +/-    1.92  0.110 / 0.080