PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/10/13-16:27:50
G02     46.6           43.9               11.8 +/-    1.24      16.2 +/-    1.24  0.060 / 0.050
G05     108.2          70.6               12.9 +/-    0.73      13.6 +/-    0.73  0.030 / 0.050
G12     190.3          51.2               14.5 +/-    1.77      18.1 +/-    1.77  0.030 / 0.030
G20     201.5          41.8               15.2 +/-    0.87      21.5 +/-    0.87  0.030 / 0.040
G25     263.9          59.2               14.2 +/-    1.16      16.3 +/-    1.16  0.030 / 0.050
G29     320.9          44.7                9.4 +/-    1.30      12.7 +/-    1.30  0.040 / 0.050