PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/17-01:57:20
G02     51.9           38.9               10.9 +/-    1.91      16.1 +/-    1.91  0.050 / 0.060
G05     76.5           66.9               11.0 +/-    0.53      11.8 +/-    0.53  0.040 / 0.060
G12     186.6          43.3               13.9 +/-    0.81      19.3 +/-    0.81  0.030 / 0.030
G25     256.2          57.1               14.0 +/-    2.46      16.3 +/-    2.46  0.030 / 0.040
G29     321.2          44.4               12.0 +/-    1.17      16.3 +/-    1.17  0.060 / 0.040