PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/09/05-18:27:50
G02     31.3           57.3               16.7 +/-    0.37      19.4 +/-    0.37  0.030 / 0.030
G05     150.8          59.3               19.5 +/-    0.79      22.2 +/-    0.79  0.030 / 0.040
G06     53.6           16.8               12.6 +/-    1.20      30.0 +/-    1.20  0.050 / 0.050
G12     200.3          68.2               16.2 +/-    1.51      17.3 +/-    1.51  0.040 / 0.060
G20     198.0          26.4               20.6 +/-    1.99      39.0 +/-    1.99  0.090 / 0.210
G25     293.7          56.2               15.9 +/-    0.61      18.7 +/-    0.61  0.130 / 0.220
G29     308.6          30.4               15.6 +/-    1.23      27.1 +/-    1.23  0.100 / 0.200