PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/12/22-18:27:50
G08     273.6          20.1                8.5 +/-    2.01      18.6 +/-    2.01  0.300 / 0.220
G10     48.5           60.9                8.0 +/-    0.82       9.0 +/-    0.82  0.260 / 0.260
G11     315.6          12.6                5.9 +/-    3.14      15.5 +/-    3.14  0.130 / 0.130
G14     255.0          62.3                8.9 +/-    0.47       9.9 +/-    0.47  0.080 / 0.110
G18     87.1           38.4                8.4 +/-    0.93      12.5 +/-    0.93  0.300 / 0.280
G21     151.9          16.3                7.6 +/-    2.55      18.3 +/-    2.55  0.280 / 0.130
G24     42.9           15.3                7.6 +/-    1.70      18.7 +/-    1.70  0.040 / 0.050
G27     235.2          19.5                8.5 +/-    4.57      18.9 +/-    4.57  0.050 / 0.050
G31     180.5          23.1               10.7 +/-    1.22      21.8 +/-    1.22  0.020 / 0.020
G32     311.8          75.8                8.3 +/-    0.39       8.6 +/-    0.39  0.020 / 0.020