PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/12/19-14:42:40
G10     243.3          19.4                4.3 +/-    1.69       9.6 +/-    1.69  0.050 / 0.050
G13     64.0           35.1                4.1 +/-    0.77       6.6 +/-    0.77  0.080 / 0.060
G15     102.6          56.6                6.9 +/-    0.37       8.1 +/-    0.37  0.050 / 0.050
G16     308.4          13.0                2.4 +/-    1.77       6.3 +/-    1.77  0.030 / 0.040
G18     258.1          51.9                4.7 +/-    0.92       5.8 +/-    0.92  0.100 / 0.180
G20     33.1           59.5                3.9 +/-    0.62       4.5 +/-    0.62  0.110 / 0.210
G21     329.5          57.9                2.5 +/-    0.60       2.9 +/-    0.60  0.090 / 0.240
G26     279.1          18.2                1.8 +/-    1.17       4.2 +/-    1.17  0.090 / 0.310
G29     159.5          56.1                6.7 +/-    0.46       7.9 +/-    0.46  0.030 / 0.050