PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/09/09-18:12:20
G02     32.1           56.6               14.7 +/-    1.09      17.3 +/-    1.09  0.040 / 0.050
G05     149.5          60.0               15.8 +/-    0.44      18.0 +/-    0.44  0.050 / 0.050
G06     53.9           16.4               11.5 +/-    1.88      27.6 +/-    1.88  0.030 / 0.040
G12     199.8          67.6               14.3 +/-    0.47      15.3 +/-    0.47  0.030 / 0.040
G20     198.1          27.0               16.0 +/-    2.75      30.0 +/-    2.75  0.140 / 0.220
G25     292.9          56.4               15.5 +/-    2.19      18.2 +/-    2.19  0.180 / 0.200
G29     309.1          31.0               13.1 +/-    1.10      22.5 +/-    1.10  0.020 / 0.040