PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/09/07-18:27:50
G02     34.9           54.3               17.9 +/-    0.95      21.4 +/-    0.95  0.030 / 0.050
G05     145.3          62.8               19.8 +/-    0.47      22.0 +/-    0.47  0.030 / 0.040
G06     55.6           14.1               14.7 +/-    3.57      37.3 +/-    3.57  0.040 / 0.030
G12     196.3          64.3               17.1 +/-    0.71      18.8 +/-    0.71  0.030 / 0.030
G20     198.5          30.1               19.3 +/-    1.63      33.7 +/-    1.63  0.190 / 0.180
G25     287.3          58.0               16.3 +/-    0.77      18.8 +/-    0.77  0.190 / 0.160
G29     311.2          33.3               15.6 +/-    1.17      25.6 +/-    1.17  0.030 / 0.030