PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/09/08-16:57:30
G02     297.5          81.1                9.1 +/-    0.69       9.2 +/-    0.69  0.210 / 0.210
G05     171.1          24.1               13.5 +/-    3.31      26.9 +/-    3.31  0.120 / 0.150
G06     40.4           46.8                7.4 +/-    0.63       9.7 +/-    0.63  0.030 / 0.040
G12     318.0          64.9                8.7 +/-    0.49       9.5 +/-    0.49  0.030 / 0.040
G17     82.7           12.6                7.9 +/-    1.08      20.8 +/-    1.08  0.080 / 0.130
G19     70.9           29.3                7.2 +/-    3.04      12.8 +/-    3.04  0.110 / 0.130
G24     235.1          27.4               10.7 +/-    1.84      19.8 +/-    1.84  0.050 / 0.040
G25     317.7          26.7               11.1 +/-    1.97      20.9 +/-    1.97  0.050 / 0.040