PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/01/19-20:57:40
G01     219.8          10.5               13.5 +/-    1.33      37.3 +/-    1.33  0.040 / 0.050
G03     253.3          70.4                9.7 +/-    1.27      10.3 +/-    1.27  0.050 / 0.040
G09     299.5          12.9               10.4 +/-    1.84      27.2 +/-    1.84  0.040 / 0.060
G14     94.7           18.8               12.1 +/-    1.38      27.4 +/-    1.38  0.050 / 0.060
G16     139.8          53.5               15.0 +/-    0.63      18.1 +/-    0.63  0.130 / 0.290
G22     200.0          61.8               12.0 +/-    0.52      13.5 +/-    0.52  0.320 / 0.460
G23     314.7          44.5               10.9 +/-    1.49      14.8 +/-    1.49  0.070 / 0.110
G26     80.2           54.2               10.4 +/-    0.67      12.5 +/-    0.67  0.080 / 0.130
G31     49.1           24.8                9.3 +/-    1.44      18.4 +/-    1.44  0.130 / 0.250