PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/07/24-21:42:50
G02     36.9           52.7                9.6 +/-    1.58      11.7 +/-    1.58  0.030 / 0.050
G05     130.5          67.3               10.5 +/-    0.45      11.3 +/-    0.45  0.030 / 0.040
G06     58.7           9.6                 8.7 +/-    3.22      24.4 +/-    3.22  0.040 / 0.050
G12     190.6          57.6               10.2 +/-    0.75      11.8 +/-    0.75  0.040 / 0.040
G20     198.8          35.9               11.5 +/-    0.83      17.9 +/-    0.83  0.030 / 0.040
G25     275.2          60.2               13.7 +/-    0.99      15.5 +/-    0.99  0.040 / 0.040
G29     313.6          35.4                9.3 +/-    1.26      14.7 +/-    1.26  0.040 / 0.030