PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/02/14-19:42:50
G03     215.1          61.4                9.8 +/-    1.37      10.9 +/-    1.37  0.050 / 0.070
G07     253.1          11.7                5.3 +/-   19.98      14.1 +/-   19.98  0.050 / 0.050
G09     307.4          23.1                9.5 +/-    2.35      19.3 +/-    2.35  0.040 / 0.040
G14     105.6          10.4               10.5 +/-    2.94      28.9 +/-    2.94  0.040 / 0.040
G16     111.2          63.8               10.3 +/-    0.95      11.4 +/-    0.95  0.190 / 0.420
G22     189.3          46.3                9.6 +/-    0.93      12.7 +/-    0.93  0.220 / 0.350
G23     326.9          56.6                9.3 +/-    0.81      10.9 +/-    0.81  0.140 / 0.260
G26     58.3           46.8                7.7 +/-    0.55      10.1 +/-    0.55  0.240 / 0.320
G31     56.6           13.4                6.1 +/-    2.41      15.7 +/-    2.41  0.070 / 0.230