PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/07/31-21:12:30
G02     36.8           52.8               10.8 +/-    1.52      13.1 +/-    1.52  0.030 / 0.050
G05     133.1          66.8               11.6 +/-    0.43      12.6 +/-    0.43  0.040 / 0.060
G06     58.3           10.2                9.0 +/-    3.21      24.9 +/-    3.21  0.030 / 0.040
G12     191.3          58.5               12.1 +/-    0.60      13.9 +/-    0.60  0.030 / 0.040
G20     198.7          35.1               13.9 +/-    1.49      22.0 +/-    1.49  0.030 / 0.030
G25     275.8          60.4                5.3 +/-    1.59       6.0 +/-    1.59  0.030 / 0.040
G29     313.3          35.1                9.6 +/-    2.09      15.2 +/-    2.09  0.040 / 0.070