PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/12/17-22:42:30
G01     229.3          19.8               10.5 +/-    1.14      23.3 +/-    1.14  0.020 / 0.030
G03     295.6          65.1                5.3 +/-    1.43       5.7 +/-    1.43  0.030 / 0.030
G14     83.3           26.4                8.0 +/-    0.58      15.0 +/-    0.58  0.070 / 0.190
G16     154.1          39.3               13.5 +/-    1.15      19.9 +/-    1.15  0.090 / 0.200
G22     230.0          73.6                8.7 +/-    0.87       9.0 +/-    0.87  0.040 / 0.060
G23     304.0          34.0                8.1 +/-    1.16      13.0 +/-    1.16  0.030 / 0.090
G26     107.9          53.5                9.7 +/-    0.83      11.7 +/-    0.83  0.070 / 0.100
G31     43.1           37.4                5.8 +/-    0.66       8.7 +/-    0.66  0.060 / 0.120