PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/09/04-16:57:50
G02     254.9          78.0               15.7 +/-    0.37      16.0 +/-    0.37  0.220 / 0.300
G05     173.8          17.2               18.8 +/-    0.99      44.3 +/-    0.99  0.270 / 0.290
G06     40.0           53.9               13.9 +/-    0.64      16.7 +/-    0.64  0.130 / 0.110
G12     321.1          57.4               11.7 +/-    0.55      13.6 +/-    0.55  0.120 / 0.140
G17     76.8           16.9               12.2 +/-    1.91      29.0 +/-    1.91  0.030 / 0.040
G19     64.0           33.7               12.7 +/-    1.47      20.6 +/-    1.47  0.030 / 0.040
G24     241.9          32.2               12.5 +/-    1.21      20.9 +/-    1.21  0.100 / 0.130
G25     317.6          20.2               11.9 +/-    2.73      26.0 +/-    2.73  0.100 / 0.210