PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/06-21:57:40
G02     199.7          19.5               17.7 +/-    1.08      39.6 +/-    1.08  0.140 / 0.210
G06     171.0          52.1               14.3 +/-    1.82      17.5 +/-    1.82  0.170 / 0.170
G13     229.0          14.5               18.1 +/-    3.37      45.6 +/-    3.37  0.100 / 0.280
G17     12.9           64.2               10.9 +/-    0.62      12.0 +/-    0.62  0.080 / 0.210
G19     311.4          70.9               11.0 +/-    0.92      11.6 +/-    0.92  0.140 / 0.210
G24     311.4          28.1               11.1 +/-    1.57      20.3 +/-    1.57  0.110 / 0.260
G28     85.8           40.7               13.8 +/-    0.83      19.8 +/-    0.83  0.040 / 0.080
G30     156.5          15.6               17.7 +/-    2.57      43.3 +/-    2.57  0.040 / 0.090