PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/07/27-22:13:10
G02     54.0           38.7               10.1 +/-    1.07      15.0 +/-    1.07  0.060 / 0.060
G05     71.0           67.7               10.0 +/-    0.51      10.7 +/-    0.51  0.060 / 0.080
G12     185.1          36.2               12.6 +/-    0.90      19.5 +/-    0.90  0.050 / 0.060
G13     133.0          12.1               16.3 +/-    4.42      43.4 +/-    4.42  0.040 / 0.050
G20     204.4          56.6               12.1 +/-    0.33      14.2 +/-    0.33  0.110 / 0.490
G21     267.3          14.5               10.9 +/-    2.94      27.6 +/-    2.94  0.150 / 0.570
G25     235.2          54.1               11.4 +/-    2.70      13.7 +/-    2.70  0.060 / 0.070
G29     326.5          52.0               10.4 +/-    0.33      12.9 +/-    0.33  0.080 / 0.090