PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/08/30-19:42:30
G02     50.8           40.8               14.1 +/-    0.51      20.3 +/-    0.51  0.200 / 0.560
G05     92.1           71.7               15.3 +/-    0.64      16.1 +/-    0.64  0.250 / 0.690
G12     187.2          42.9               15.2 +/-    0.99      21.1 +/-    0.99  0.060 / 0.090
G20     202.8          50.1               18.3 +/-    1.00      23.1 +/-    1.00  0.050 / 0.070
G21     263.6          11.9               13.9 +/-    3.29      37.2 +/-    3.29  0.070 / 0.060
G25     246.2          57.4               15.9 +/-    0.96      18.5 +/-    0.96  0.050 / 0.060
G29     324.0          48.5               14.7 +/-    0.91      18.9 +/-    0.91  0.050 / 0.080