PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/01/21-20:28:00
G01     226.6          17.2               10.2 +/-    3.94      23.9 +/-    3.94  0.030 / 0.030
G03     284.6          68.8                8.4 +/-    1.23       9.0 +/-    1.23  0.030 / 0.030
G14     86.2           24.9               10.7 +/-    0.76      20.9 +/-    0.76  0.130 / 0.350
G16     149.4          44.0               12.1 +/-    0.57      16.5 +/-    0.57  0.110 / 0.340
G22     215.9          70.8               11.5 +/-    0.57      12.1 +/-    0.57  0.040 / 0.080
G23     307.4          37.4                9.2 +/-    0.99      13.9 +/-    0.99  0.040 / 0.080
G26     98.6           54.3                9.0 +/-    0.56      10.8 +/-    0.56  0.040 / 0.080
G31     44.9           32.8                7.2 +/-    0.29      12.0 +/-    0.29  0.040 / 0.080