PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/09/09-18:12:40
G02     32.1           56.6               15.0 +/-    0.54      17.5 +/-    0.54  0.020 / 0.050
G05     149.5          60.0               16.2 +/-    0.85      18.4 +/-    0.85  0.030 / 0.040
G06     53.9           16.4               11.6 +/-    0.99      28.0 +/-    0.99  0.050 / 0.060
G12     199.8          67.6               14.1 +/-    1.07      15.1 +/-    1.07  0.040 / 0.060
G20     198.1          27.0               15.0 +/-    2.06      28.1 +/-    2.06  0.030 / 0.070
G25     292.9          56.4               14.0 +/-    1.10      16.4 +/-    1.10  0.040 / 0.040
G29     309.1          31.0               12.9 +/-    1.27      22.1 +/-    1.27  0.100 / 0.190