PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/12/22-19:28:00
G01     314.4          26.0                7.1 +/-    1.23      13.6 +/-    1.23  0.100 / 0.150
G10     94.0           47.6                8.4 +/-    0.53      11.0 +/-    0.53  0.130 / 0.120
G11     293.9          26.5                6.3 +/-    3.58      11.9 +/-    3.58  0.030 / 0.040
G14     329.9          70.5                6.9 +/-    0.56       7.2 +/-    0.56  0.030 / 0.040
G18     110.7          20.2                9.6 +/-    1.06      21.0 +/-    1.06  0.170 / 0.240
G22     305.4          17.5                7.1 +/-    2.17      16.5 +/-    2.17  0.140 / 0.180
G25     91.9           13.0               10.4 +/-    2.11      27.0 +/-    2.11  0.050 / 0.040
G31     174.8          52.4               10.8 +/-    0.94      13.2 +/-    0.94  0.050 / 0.040
G32     22.9           60.4                6.9 +/-    0.78       7.8 +/-    0.78  0.030 / 0.020