PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/07-16:43:00
G07     320.6          52.8               11.4 +/-    1.51      13.9 +/-    1.51  0.030 / 0.060
G08     117.2          48.5               13.2 +/-    0.59      17.0 +/-    0.59  0.030 / 0.050
G09     221.3          81.6               11.7 +/-    1.04      11.8 +/-    1.04  0.050 / 0.070
G16     44.5           12.6                7.5 +/-    1.30      19.7 +/-    1.30  0.030 / 0.070
G23     150.4          45.5               13.3 +/-    1.59      17.8 +/-    1.59  0.030 / 0.060
G27     63.7           35.1                9.2 +/-    0.58      14.6 +/-    0.58  0.030 / 0.060
G28     231.2          22.9               15.6 +/-    1.71      31.9 +/-    1.71  0.110 / 0.300
G30     295.8          30.5               10.5 +/-    1.43      18.2 +/-    1.43  0.120 / 0.350