PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/10/17-16:13:10
G02     47.6           43.0                9.0 +/-    0.76      12.5 +/-    0.76  0.040 / 0.030
G05     103.9          70.7                9.3 +/-    0.88       9.8 +/-    0.88  0.050 / 0.030
G12     190.0          50.1               10.1 +/-    2.28      12.8 +/-    2.28  0.060 / 0.060
G20     201.8          42.8               11.2 +/-    0.55      15.6 +/-    0.55  0.030 / 0.070
G25     261.9          59.0               11.2 +/-    0.56      12.8 +/-    0.56  0.050 / 0.080
G29     321.8          45.8                7.6 +/-    1.33      10.1 +/-    1.33  0.060 / 0.090