PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/09/30-16:42:40
G02     31.3           57.3               12.5 +/-    0.96      14.5 +/-    0.96  0.040 / 0.050
G05     149.5          58.9               15.6 +/-    0.57      17.8 +/-    0.57  0.060 / 0.050
G06     52.6           18.5               11.6 +/-    2.15      26.4 +/-    2.15  0.020 / 0.030
G12     203.7          69.9               14.5 +/-    0.79      15.3 +/-    0.79  0.030 / 0.020
G20     198.2          24.7               14.3 +/-    3.17      28.1 +/-    3.17  0.020 / 0.040
G25     296.9          54.6               13.1 +/-    3.77      15.7 +/-    3.77  0.020 / 0.030
G29     308.3          30.6               12.9 +/-    1.79      22.4 +/-    1.79  0.180 / 0.300