PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/10/12-04:58:00
G03     204.8          46.6                7.5 +/-    2.44       9.9 +/-    2.44  0.060 / 0.110
G07     268.1          24.4                7.8 +/-    1.74      15.5 +/-    1.74  0.060 / 0.130
G09     316.6          40.4                5.9 +/-    1.17       8.6 +/-    1.17  0.110 / 0.120
G16     71.0           64.3                6.5 +/-    0.80       7.1 +/-    0.80  0.060 / 0.110
G22     185.0          29.8                6.8 +/-    1.90      12.0 +/-    1.90  0.030 / 0.040
G23     341.3          69.7                4.2 +/-    0.75       4.4 +/-    0.75  0.040 / 0.040
G26     47.3           37.4                4.7 +/-    0.43       7.2 +/-    0.43  0.080 / 0.080
G27     122.9          19.7                8.2 +/-    0.90      18.1 +/-    0.90  0.070 / 0.080