PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/02/17-18:57:50
G01     220.3          10.9               12.9 +/-    2.15      35.3 +/-    2.15  0.030 / 0.040
G03     250.3          71.0               12.2 +/-    0.75      12.9 +/-    0.75  0.040 / 0.040
G09     299.1          12.3                8.9 +/-    1.96      23.6 +/-    1.96  0.160 / 0.090
G14     93.8           19.9               11.3 +/-    1.47      24.9 +/-    1.47  0.120 / 0.120
G16     138.5          53.4               14.6 +/-    0.68      17.7 +/-    0.68  0.050 / 0.040
G22     198.5          61.7               13.5 +/-    1.05      15.1 +/-    1.05  0.040 / 0.050
G23     315.0          45.0               12.1 +/-    1.17      16.3 +/-    1.17  0.100 / 0.270
G26     79.9           53.8               12.2 +/-    0.82      14.7 +/-    0.82  0.110 / 0.260
G31     49.1           24.3               10.4 +/-    2.38      20.7 +/-    2.38  0.150 / 0.380