PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/01/19-20:42:30
G01     224.4          15.1               12.4 +/-    1.14      30.7 +/-    1.14  0.040 / 0.050
G03     275.8          70.0               10.6 +/-    0.60      11.2 +/-    0.60  0.040 / 0.040
G14     88.9           23.0               11.6 +/-    0.71      23.7 +/-    0.71  0.030 / 0.070
G16     146.9          47.0               14.3 +/-    1.10      18.7 +/-    1.10  0.040 / 0.070
G22     209.6          68.3               12.8 +/-    0.51      13.6 +/-    0.51  0.180 / 0.210
G23     309.6          39.5               11.3 +/-    0.82      16.5 +/-    0.82  0.140 / 0.220
G26     92.9           54.8               11.7 +/-    0.61      13.9 +/-    0.61  0.050 / 0.110
G31     46.1           30.2                9.4 +/-    0.58      16.3 +/-    0.58  0.060 / 0.080