PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/12/17-08:57:40
G02     212.7          58.6                7.9 +/-    0.78       9.0 +/-    0.78  0.150 / 0.310
G06     91.1           81.9                6.8 +/-    0.46       6.8 +/-    0.46  0.160 / 0.270
G12     317.2          31.6                5.8 +/-    1.43       9.9 +/-    1.43  0.110 / 0.090
G17     55.5           33.7                3.7 +/-    1.24       6.1 +/-    1.24  0.090 / 0.080
G19     37.3           50.3                3.7 +/-    2.04       4.6 +/-    2.04  0.050 / 0.080
G24     271.6          41.8                6.3 +/-    1.99       8.9 +/-    1.99  0.050 / 0.060
G28     120.9          15.3                6.1 +/-    2.74      15.0 +/-    2.74  0.030 / 0.020