PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/02/13-21:42:40
G03     185.6          11.0               11.2 +/-    1.36      30.6 +/-    1.36  0.050 / 0.150
G07     300.1          42.7                8.8 +/-    0.82      12.2 +/-    0.82  0.060 / 0.160
G08     136.1          35.5               11.3 +/-    1.02      17.7 +/-    1.02  0.050 / 0.090
G09     315.2          71.6                7.5 +/-    0.37       7.9 +/-    0.37  0.050 / 0.090
G16     41.6           30.6                6.8 +/-    0.86      11.7 +/-    0.86  0.050 / 0.070
G23     137.3          68.7                8.1 +/-    0.55       8.7 +/-    0.55  0.040 / 0.090
G27     86.1           36.5                7.7 +/-    0.73      11.9 +/-    0.73  0.030 / 0.040