PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/19-21:28:10
G02     201.7          30.0               19.8 +/-    1.09      34.7 +/-    1.09  0.130 / 0.230
G06     163.7          64.4               18.4 +/-    0.24      20.2 +/-    0.24  0.270 / 0.290
G12     305.0          12.2               10.0 +/-   16.56      26.5 +/-   16.56  0.050 / 0.090
G17     27.7           55.4               16.0 +/-    1.09      19.0 +/-    1.09  0.050 / 0.110
G19     344.8          68.3               15.1 +/-    0.46      16.2 +/-    0.46  0.050 / 0.030
G24     302.8          35.6               15.6 +/-    1.62      24.6 +/-    1.62  0.040 / 0.030
G28     97.7           34.2               16.7 +/-    0.68      26.9 +/-    0.68  0.110 / 0.110