PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/08/22-19:42:30
G02     38.0           51.8               11.5 +/-    0.88      14.2 +/-    0.88  0.030 / 0.030
G05     136.9          66.5               12.0 +/-    0.44      13.0 +/-    0.44  0.030 / 0.030
G06     58.2           10.7                9.5 +/-    2.00      26.2 +/-    2.00  0.040 / 0.040
G12     192.4          59.1               13.8 +/-    0.38      15.8 +/-    0.38  0.030 / 0.050
G20     199.0          34.8               12.6 +/-    1.45      20.2 +/-    1.45  0.040 / 0.080
G25     277.3          59.9               12.4 +/-    1.39      14.1 +/-    1.39  0.070 / 0.070
G29     313.8          35.9               10.9 +/-    1.64      17.0 +/-    1.64  0.030 / 0.030