PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/01/18-21:13:10
G03     236.9          68.4                8.2 +/-    0.54       8.7 +/-    0.54  0.040 / 0.040
G09     302.7          16.7                7.2 +/-    1.47      17.2 +/-    1.47  0.030 / 0.040
G14     99.1           15.4                8.9 +/-    2.17      22.0 +/-    2.17  0.140 / 0.230
G16     132.2          58.2               10.5 +/-    0.41      12.1 +/-    0.41  0.220 / 0.220
G22     195.3          56.3                9.0 +/-    0.52      10.5 +/-    0.52  0.030 / 0.050
G23     318.8          48.6                8.1 +/-    0.78      10.4 +/-    0.78  0.030 / 0.040
G26     71.1           52.5                6.7 +/-    0.67       8.2 +/-    0.67  0.100 / 0.220
G31     51.6           20.6                7.3 +/-    3.94      15.9 +/-    3.94  0.130 / 0.370