PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/12/26-21:27:30
G03     272.8          69.9                7.9 +/-    0.86       8.3 +/-    0.86  0.050 / 0.040
G09     297.5          12.2                3.8 +/-   23.78      10.1 +/-   23.78  0.050 / 0.040
G14     91.1           20.4                8.5 +/-    2.84      18.4 +/-    2.84  0.150 / 0.240
G16     143.6          49.0               12.1 +/-    0.63      15.4 +/-    0.63  0.140 / 0.270
G22     207.3          66.2                7.7 +/-    0.67       8.3 +/-    0.67  0.050 / 0.060
G23     309.8          39.1                6.1 +/-    1.74       9.0 +/-    1.74  0.040 / 0.060
G26     92.8           55.7                9.2 +/-    0.34      10.9 +/-    0.34  0.140 / 0.080
G31     46.0           32.1                6.2 +/-    2.03      10.3 +/-    2.03  0.090 / 0.080