PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/12/13-18:12:30
G08     297.7          22.3                9.9 +/-    1.56      20.6 +/-    1.56  0.090 / 0.100
G10     356.6          62.6                8.6 +/-    0.83       9.5 +/-    0.83  0.080 / 0.090
G14     226.6          42.8               13.0 +/-    1.68      18.1 +/-    1.68  0.070 / 0.080
G18     59.9           52.1               10.1 +/-    1.08      12.5 +/-    1.08  0.080 / 0.110
G24     61.2           28.1                8.5 +/-    2.22      15.5 +/-    2.22  0.030 / 0.020
G27     257.5          33.5               12.8 +/-    1.46      20.9 +/-    1.46  0.030 / 0.030
G32     238.3          63.2               11.7 +/-    1.46      13.0 +/-    1.46  0.090 / 0.130