PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/09/16-17:27:30
G02     24.9           62.2               14.4 +/-    0.52      16.0 +/-    0.52  0.020 / 0.040
G05     156.6          53.0               15.9 +/-    1.29      19.4 +/-    1.29  0.030 / 0.030
G06     50.0           22.3               10.6 +/-    0.45      22.0 +/-    0.45  0.040 / 0.060
G12     215.1          75.1               13.1 +/-    0.41      13.5 +/-    0.41  0.030 / 0.060
G19     95.3           12.5               14.5 +/-    0.84      38.2 +/-    0.84  0.130 / 0.350
G20     197.6          19.7               16.7 +/-    0.94      37.0 +/-    0.94  0.090 / 0.370
G25     303.6          51.3               15.0 +/-    1.29      18.6 +/-    1.29  0.030 / 0.040
G29     304.0          26.0               12.1 +/-    1.81      23.1 +/-    1.81  0.030 / 0.050