PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/12/16-05:28:00
G01     88.7           32.1                8.1 +/-    0.61      13.6 +/-    0.61  0.040 / 0.050
G07     126.6          43.9                9.3 +/-    1.27      12.7 +/-    1.27  0.060 / 0.060
G11     68.1           39.2                6.4 +/-    0.75       9.4 +/-    0.75  0.040 / 0.060
G13     294.5          35.5                7.3 +/-    1.35      11.4 +/-    1.35  0.050 / 0.060
G15     314.2          11.0                0.3 +/-   14.02       0.9 +/-   14.02  0.120 / 0.320
G17     215.5          55.7               10.2 +/-    1.68      12.0 +/-    1.68  0.090 / 0.320
G19     215.1          29.4                9.3 +/-    1.60      16.5 +/-    1.60  0.100 / 0.090
G28     353.1          61.5                5.1 +/-    1.24       5.8 +/-    1.24  0.100 / 0.110
G30     109.7          73.4                8.7 +/-    0.57       9.0 +/-    0.57  0.040 / 0.040