PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/08/31-19:42:20
G02     52.3           39.4               15.0 +/-    1.06      22.0 +/-    1.06  0.040 / 0.050
G05     85.9           71.3               16.8 +/-    0.39      17.7 +/-    0.39  0.040 / 0.080
G12     186.8          40.9               19.0 +/-    1.43      27.3 +/-    1.43  0.190 / 0.640
G20     203.5          52.1               20.7 +/-    1.45      25.4 +/-    1.45  0.190 / 0.450
G21     265.0          13.0               16.1 +/-    4.59      42.1 +/-    4.59  0.030 / 0.080
G25     242.9          56.4               16.4 +/-    0.83      19.3 +/-    0.83  0.050 / 0.070
G29     325.3          50.1               14.4 +/-    0.89      18.1 +/-    0.89  0.020 / 0.040