PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/16-15:57:50
G07     316.0          50.7               10.6 +/-    1.02      13.3 +/-    1.02  0.040 / 0.050
G08     121.6          46.2               12.9 +/-    0.46      17.1 +/-    0.46  0.030 / 0.050
G09     249.2          83.0                9.7 +/-    0.49       9.7 +/-    0.49  0.100 / 0.140
G16     43.6           15.5                8.2 +/-    2.58      20.1 +/-    2.58  0.110 / 0.160
G23     148.7          50.1               12.5 +/-    1.22      15.7 +/-    1.22  0.030 / 0.060
G27     68.2           36.2               10.4 +/-    1.16      16.2 +/-    1.16  0.030 / 0.050
G28     228.8          19.8               12.1 +/-    1.72      26.8 +/-    1.72  0.150 / 0.470
G30     292.7          27.9                8.1 +/-    1.26      14.8 +/-    1.26  0.170 / 0.380