PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/09/13-17:57:50
G02     32.9           56.0               15.2 +/-    0.48      18.0 +/-    0.48  0.030 / 0.050
G05     148.2          60.7               18.3 +/-    0.70      20.6 +/-    0.70  0.050 / 0.050
G06     54.2           16.1               12.2 +/-    1.60      29.5 +/-    1.60  0.050 / 0.050
G12     199.2          67.0               16.0 +/-    0.97      17.2 +/-    0.97  0.050 / 0.050
G20     198.2          27.5               19.7 +/-    1.20      36.4 +/-    1.20  0.100 / 0.240
G25     292.1          56.6               15.3 +/-    1.38      18.0 +/-    1.38  0.100 / 0.360
G29     309.6          31.7               13.4 +/-    0.90      22.7 +/-    0.90  0.050 / 0.040