PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/09/16-17:43:00
G02     31.8           56.9               13.6 +/-    1.02      15.9 +/-    1.02  0.050 / 0.040
G05     149.5          59.7               15.9 +/-    0.38      18.2 +/-    0.38  0.050 / 0.040
G06     53.5           17.1               11.4 +/-    2.27      27.0 +/-    2.27  0.030 / 0.030
G12     201.0          68.4               14.1 +/-    0.41      15.0 +/-    0.41  0.030 / 0.030
G20     198.1          26.2               15.9 +/-    2.93      30.2 +/-    2.93  0.040 / 0.030
G25     294.3          55.8               13.5 +/-    3.75      16.0 +/-    3.75  0.030 / 0.040
G29     308.8          30.9               13.3 +/-    0.99      22.9 +/-    0.99  0.060 / 0.120