PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/22-13:13:00
G03     214.0          59.4                8.9 +/-    1.10      10.2 +/-    1.10  0.120 / 0.310
G07     255.4          13.6                6.8 +/-    3.76      17.4 +/-    3.76  0.140 / 0.360
G09     309.4          26.6                6.3 +/-    1.46      11.9 +/-    1.46  0.080 / 0.230
G14     106.9          11.2                6.6 +/-    1.66      18.0 +/-    1.66  0.060 / 0.310
G16     96.8           63.7                8.7 +/-    1.08       9.6 +/-    1.08  0.050 / 0.080
G22     185.8          41.0                8.2 +/-    1.01      11.7 +/-    1.01  0.070 / 0.070
G23     333.3          61.7                7.1 +/-    0.96       7.9 +/-    0.96  0.030 / 0.030
G26     54.1           43.0                7.4 +/-    0.77      10.3 +/-    0.77  0.040 / 0.040
G31     58.9           9.7                 7.7 +/-    3.96      21.7 +/-    3.96  0.040 / 0.040