PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/01/19-20:57:40
G03     253.3          70.4               12.0 +/-    0.53      12.6 +/-    0.53  0.050 / 0.040
G09     299.5          12.9               10.0 +/-    1.62      26.2 +/-    1.62  0.050 / 0.040
G14     94.7           18.8               11.7 +/-    1.54      26.6 +/-    1.54  0.070 / 0.100
G16     139.8          53.5               15.2 +/-    1.01      18.4 +/-    1.01  0.100 / 0.090
G22     200.0          61.8               12.7 +/-    0.57      14.2 +/-    0.57  0.040 / 0.060
G23     314.7          44.5               10.8 +/-    0.71      14.7 +/-    0.71  0.040 / 0.050
G26     80.2           54.2               11.3 +/-    0.99      13.6 +/-    0.99  0.190 / 0.190
G31     49.1           24.8                9.4 +/-    3.03      18.5 +/-    3.03  0.110 / 0.250