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               13.9 +/-    1.20      16.4 +/-    1.20  0.040 / 0.040
G05     148.2          60.7               17.3 +/-    0.39      19.5 +/-    0.39  0.040 / 0.050
G06     54.2           16.1               11.5 +/-    1.79      27.8 +/-    1.79  0.030 / 0.030
G12     199.2          67.0               15.3 +/-    0.54      16.4 +/-    0.54  0.030 / 0.030
G20     198.2          27.5               19.4 +/-    1.75      35.8 +/-    1.75  0.030 / 0.040
G25     292.1          56.6               15.5 +/-    1.63      18.1 +/-    1.63  0.040 / 0.030
G29     309.6          31.7               12.7 +/-    1.62      21.4 +/-    1.62  0.070 / 0.100