PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/10/13-15:57:20
G02     35.3           54.0               11.6 +/-    0.41      13.9 +/-    0.41  0.050 / 0.040
G05     142.8          62.6               13.9 +/-    1.09      15.4 +/-    1.09  0.040 / 0.040
G06     54.5           16.3                8.8 +/-    0.75      21.2 +/-    0.75  0.050 / 0.050
G12     199.3          66.2               10.8 +/-    0.54      11.7 +/-    0.54  0.040 / 0.050
G20     198.8          27.9               13.7 +/-    1.98      25.1 +/-    1.98  0.040 / 0.060
G25     291.5          56.3               11.1 +/-    1.39      13.1 +/-    1.39  0.040 / 0.040
G29     311.3          33.9                7.3 +/-    0.74      11.8 +/-    0.74  0.090 / 0.160