PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/12/27-18:12:50
G08     271.3          19.3                9.6 +/-    2.17      21.4 +/-    2.17  0.230 / 0.130
G10     53.5           60.2                9.2 +/-    0.66      10.4 +/-    0.66  0.150 / 0.130
G11     314.3          14.1                6.2 +/-    2.56      15.7 +/-    2.56  0.180 / 0.360
G14     259.6          63.9               10.5 +/-    0.95      11.5 +/-    0.95  0.080 / 0.120
G18     89.6           36.8               10.0 +/-    1.16      15.3 +/-    1.16  0.100 / 0.140
G21     152.5          14.2               12.8 +/-    2.91      32.4 +/-    2.91  0.090 / 0.130
G24     41.7           13.5                7.1 +/-    4.04      18.3 +/-    4.04  0.020 / 0.020
G27     233.3          17.8               11.5 +/-    3.13      26.7 +/-    3.13  0.020 / 0.020
G31     179.9          25.8               14.1 +/-    2.58      27.0 +/-    2.58  0.040 / 0.040
G32     323.1          75.4                9.9 +/-    0.48      10.2 +/-    0.48  0.040 / 0.050