PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/08/18-17:12:30
G02     213.7          54.0               18.4 +/-    0.82      22.1 +/-    0.82  0.050 / 0.090
G06     68.6           77.1               15.5 +/-    0.58      15.8 +/-    0.58  0.050 / 0.070
G12     317.9          33.8               13.3 +/-    1.78      21.6 +/-    1.78  0.050 / 0.090
G17     56.8           32.0               12.2 +/-    0.41      20.5 +/-    0.41  0.050 / 0.090
G19     38.5           49.6               13.1 +/-    0.57      16.6 +/-    0.57  0.040 / 0.080
G24     272.2          41.9               14.0 +/-    0.99      19.7 +/-    0.99  0.040 / 0.090
G28     120.9          15.5               13.8 +/-    1.55      33.9 +/-    1.55  0.030 / 0.030