PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/09/16-17:57:40
G02     38.0           51.6               15.1 +/-    0.78      18.6 +/-    0.78  0.030 / 0.050
G05     138.5          65.7               16.1 +/-    0.47      17.5 +/-    0.47  0.040 / 0.040
G06     57.2           12.2               11.4 +/-    1.43      30.2 +/-    1.43  0.030 / 0.030
G12     194.3          61.0               16.9 +/-    0.70      19.1 +/-    0.70  0.030 / 0.030
G20     199.1          33.0               16.9 +/-    1.35      27.9 +/-    1.35  0.020 / 0.030
G25     281.9          58.8               14.7 +/-    0.42      16.9 +/-    0.42  0.030 / 0.030
G29     313.6          36.0               13.8 +/-    0.75      21.6 +/-    0.75  0.050 / 0.070