PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/09/09-18:58:00
G02     49.6           41.6               14.6 +/-    0.38      20.7 +/-    0.38  0.060 / 0.080
G05     97.1           71.6               14.6 +/-    0.69      15.3 +/-    0.69  0.050 / 0.080
G12     187.9          45.1               14.3 +/-    0.88      19.2 +/-    0.88  0.120 / 0.760
G20     202.4          47.9               16.7 +/-    1.28      21.6 +/-    1.28  0.130 / 0.490
G21     262.3          11.0                6.4 +/-   21.67      17.5 +/-   21.67  0.050 / 0.060
G25     250.7          58.2               14.5 +/-    0.92      16.7 +/-    0.92  0.050 / 0.050
G29     323.1          47.3               13.4 +/-    1.27      17.5 +/-    1.27  0.030 / 0.030