PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/08/24-19:42:40
G02     41.3           48.9               13.1 +/-    1.05      16.7 +/-    1.05  0.030 / 0.050
G05     128.2          69.0               13.9 +/-    0.60      14.8 +/-    0.60  0.030 / 0.040
G12     190.6          55.0               13.5 +/-    0.40      16.1 +/-    0.40  0.040 / 0.050
G20     199.7          38.5               13.5 +/-    1.04      20.2 +/-    1.04  0.030 / 0.040
G25     269.3          60.2               12.5 +/-    2.39      14.2 +/-    2.39  0.020 / 0.030
G29     316.3          38.9               12.6 +/-    0.71      18.7 +/-    0.71  0.030 / 0.020