PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/12/11-23:12:50
G01     227.4          18.1                9.0 +/-    1.98      20.7 +/-    1.98  0.030 / 0.040
G03     290.8          66.5                5.4 +/-    1.47       5.8 +/-    1.47  0.030 / 0.040
G14     85.6           24.8               10.0 +/-    1.17      19.6 +/-    1.17  0.130 / 0.350
G16     152.9          41.6               12.9 +/-    0.53      18.3 +/-    0.53  0.170 / 0.360
G22     222.6          72.1                7.8 +/-    0.54       8.1 +/-    0.54  0.040 / 0.090
G23     305.8          35.5                8.2 +/-    1.20      12.8 +/-    1.20  0.040 / 0.080
G26     104.0          54.4                9.4 +/-    0.52      11.2 +/-    0.52  0.050 / 0.090
G31     43.9           35.6                5.8 +/-    1.36       9.1 +/-    1.36  0.040 / 0.090