PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/09/27-15:27:40
G02     267.0          80.1               13.8 +/-    0.82      14.0 +/-    0.82  0.150 / 0.270
G05     172.2          19.8               14.9 +/-    2.52      32.9 +/-    2.52  0.180 / 0.250
G06     39.8           53.0               10.0 +/-    1.19      12.2 +/-    1.19  0.040 / 0.030
G12     320.6          58.6               10.4 +/-    0.49      11.9 +/-    0.49  0.030 / 0.030
G17     78.2           16.0               10.8 +/-    1.83      26.3 +/-    1.83  0.080 / 0.100
G19     65.6           32.7                9.5 +/-    2.11      15.7 +/-    2.11  0.100 / 0.140
G24     240.1          31.0               10.1 +/-    2.02      17.4 +/-    2.02  0.090 / 0.210
G25     317.7          20.9               10.1 +/-    2.22      21.7 +/-    2.22  0.080 / 0.190