PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/12/11-23:12:40
G01     227.4          18.1                8.5 +/-    2.44      19.5 +/-    2.44  0.030 / 0.030
G03     290.8          66.5                6.7 +/-    0.74       7.2 +/-    0.74  0.030 / 0.030
G14     85.6           24.8                9.3 +/-    1.32      18.2 +/-    1.32  0.050 / 0.060
G16     152.9          41.6               12.3 +/-    0.96      17.4 +/-    0.96  0.040 / 0.070
G22     222.6          72.1                7.1 +/-    0.43       7.4 +/-    0.43  0.070 / 0.080
G23     305.8          35.5                8.5 +/-    1.99      13.4 +/-    1.99  0.060 / 0.050
G26     104.0          54.4                9.1 +/-    0.49      10.9 +/-    0.49  0.110 / 0.190
G31     43.9           35.6                7.4 +/-    1.07      11.6 +/-    1.07  0.140 / 0.230