PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/19-12:57:50
G03     238.3          68.7                8.5 +/-    0.92       9.0 +/-    0.92  0.080 / 0.200
G09     302.7          17.3                6.2 +/-    1.73      14.6 +/-    1.73  0.080 / 0.200
G14     97.1           19.4                4.7 +/-    0.93      10.6 +/-    0.93  0.040 / 0.040
G16     125.3          58.5                9.5 +/-    0.56      11.0 +/-    0.56  0.030 / 0.030
G22     190.5          53.9                8.3 +/-    1.52      10.0 +/-    1.52  0.040 / 0.040
G23     321.9          51.9                8.4 +/-    1.16      10.4 +/-    1.16  0.050 / 0.060
G26     68.6           50.7                7.5 +/-    0.42       9.3 +/-    0.42  0.050 / 0.050
G31     52.3           18.5                5.2 +/-    1.18      11.8 +/-    1.18  0.050 / 0.050