PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/02/16-19:27:40
G03     219.8          64.1               12.1 +/-    1.02      13.3 +/-    1.02  0.050 / 0.060
G09     305.8          20.7                9.8 +/-    1.17      21.2 +/-    1.17  0.050 / 0.050
G14     103.2          12.5               11.9 +/-    2.50      31.3 +/-    2.50  0.040 / 0.040
G16     118.4          62.3               15.6 +/-    0.73      17.3 +/-    0.73  0.050 / 0.050
G22     190.5          49.5               13.3 +/-    1.06      16.9 +/-    1.06  0.100 / 0.230
G23     324.4          54.1               12.6 +/-    0.51      15.1 +/-    0.51  0.110 / 0.130
G26     61.9           48.7               11.8 +/-    1.09      15.1 +/-    1.09  0.160 / 0.320
G31     54.9           15.5                8.5 +/-    2.15      20.8 +/-    2.15  0.130 / 0.360