PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/04/17-21:27:50
G01     75.8           33.3               12.6 +/-    1.14      20.6 +/-    1.14  0.090 / 0.260
G07     134.9          35.3               16.2 +/-    2.13      25.6 +/-    2.13  0.080 / 0.280
G11     58.1           34.8               12.4 +/-    0.94      19.7 +/-    0.94  0.090 / 0.080
G13     280.2          37.6               15.7 +/-    1.58      23.8 +/-    1.58  0.070 / 0.100
G15     306.0          14.4               10.3 +/-    3.81      26.0 +/-    3.81  0.330 / 0.400
G17     226.3          60.2               17.4 +/-    1.56      19.8 +/-    1.56  0.320 / 0.280
G18     52.9           20.4               11.3 +/-    7.39      24.7 +/-    7.39  0.070 / 0.030
G19     221.3          37.4               18.2 +/-    1.37      27.7 +/-    1.37  0.070 / 0.050
G28     12.9           60.1               14.5 +/-    1.20      16.4 +/-    1.20  0.030 / 0.010
G30     130.6          63.8               15.5 +/-    0.45      17.1 +/-    0.45  0.030 / 0.010