PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/01/21-21:12:30
G03     224.4          65.0               10.1 +/-    1.41      11.1 +/-    1.41  0.040 / 0.050
G09     305.5          20.4                9.3 +/-    1.71      20.3 +/-    1.71  0.040 / 0.050
G14     103.0          12.2               10.7 +/-    2.94      28.4 +/-    2.94  0.100 / 0.150
G16     122.3          61.9               12.4 +/-    0.81      13.9 +/-    0.81  0.130 / 0.220
G22     192.0          50.9               11.6 +/-    0.49      14.4 +/-    0.49  0.040 / 0.040
G23     322.9          52.8               10.4 +/-    0.94      12.7 +/-    0.94  0.040 / 0.050
G26     63.5           49.8                7.8 +/-    0.76       9.9 +/-    0.76  0.110 / 0.560
G31     54.3           16.8                7.0 +/-    0.96      16.6 +/-    0.96  0.110 / 0.480